Explain how the heat and phase changes affects the environment? Give examples.
(5-7 sentences)​

Answers

Answer 1
Energy is required to change the phase of a substance, such as the energy to break the bonds between molecules in a block of ice so it may melt.
During a phase change energy my be added or subtracted from a system, but the temperature will not change. The temperature will change only when the phase change has completed. No temperature change occurs from heat transfer if ice melts and becomes liquid water (i.e., during a phase change). For example, consider water dripping from icicles melting on a roof warmed by the Sun. Conversely, water freezes in an ice tray cooled by lower-temperature surroundings. Energy is required to melt a solid because the cohesive bonds between the molecules in the solid must be broken apart so that the molecules can move around at comparable kinetic energies; thus, there is no rise in temperature.

Related Questions

How many particles or molecules of hydrogen are there in one mole of H2O?

Answers

6.022 × 10^23 ×2 = 12.044 × 10^ 23 atoms

Answer:

In one mole of water, there will exist approximately 6.02⋅1023 water molecules. So, there will be a total of 6.02⋅1023⋅2≈1.2⋅1024 hydrogen atoms.

Short note of modern periodic table

Answers

Hi

In the modern periodic table, the elements are arranged in the order of their increasing atomic number. In the modern periodic table, there are seven horizontal rows called periods and eighteen vertical columns (1 to 18) called groups. The arrangement of the periods and groups results in formation of boxes.

Explanation:

If it's help pls give me Brainliest!!

what is the answer ??z???????​

Answers

Answer:

I think its Female

Explanation:

Correct me if I was wrong :)

Answer: The answer to this question about the given multiple choices about filling the blank with a missing word in order for you to complete the given statement is "Chest broadens, hips broaden and becomes the rounders. These characters are in the females."

Explanation: I chose B) "Females" for the correct answer in order to fill in the blank with a missing word for you to complete the given statement, so here's the completed statement again, "Chest broadens, hips broaden and becomes the rounders. These characters are in the females.".

I hope my answer with the given multiple choice answer and the given explanation is very helpful to your own chemistry question about the given multiple choices about filling the blank with a missing word in order for you to complete the given statement, please mark me as Brainliest and have a great day! :D

Sincerely,

Jason Ta,

The ambitious of Brainly and the role of The TDSB and WHCI Student of the high school.

How is heat transferred when a person holds a pen that is already at body
temperature?
A. From the hand to the pen
B. Heat is not transferred.
C. In both directions between the pen and the hand
D. From the pen to the hand
SUBMIT

Answers

Answer:

The answer is B.

Explanation:

Heat is not transferred.

a board measures 212 inches how many feet is this?

Answers

Answer: 17.7 feet, Its rounded up since the six repeats.

Metallic bonding is...

a
a type of covalent bond.
b
a type of ionic bond.
c
an attraction between positive and negative ions.
d
an attraction between positive ions and electrons.

Answers

Answer:

d an attraction between positive ions and electrons

Define valence electrons.

Answers

Answer:

Electrons on the outermost shell of an atom. They are responsible for the chemical properties of an atom.

What is the density of an object that has a mass of 149. 8 g and displaces 12. 1 ml of water when placed in a graduated cylinder?.

Answers

Answer:

12.38 g/mL

Explanation:

The density of a substance can be found by using the formula

[tex]d = \frac{m}{v} \\ [/tex]

m is the mass

v is the volume

From the question

m = 149.8 g

v = 12.1 mL

We have

[tex]d = \frac{149.8}{12.1} = 12.380165... \\ [/tex]

We have the final answer as

12.38 g/mL

Hope this helps you

How many moles are present in 1.39 grams of carbon?

Answers

Answer:

0.116 moles

Explanation:

To go from grams to moles, you take the given mass (1.39g) and divide it by the molar mass (which is about 12 grams for Carbon). This gives you the moles. I have attached my work below.

Hope this helps! :^)

PLEASE HURRY Potential energy is described as

Question 1 options:

Stored energy


Friction


Decreasing energy


Movement

Answers

Answer:

Potential energy is the stored energy of position possessed by an object.

Potential energy is described as stored energy. Depending on the relative positions of various system components, stored energy. When a spring is squeezed or extended, its potential energy increases.

What is potential energy ?

Potential energy is the power that an item may store due to its position in relation to other things, internal tensions, electric charge, or other circumstances.

A boulder perched precariously atop a cliff. The rock will be moving if it falls, converting the potential energy to kinetic energy. a longbow's stretched-elastic string.

Potential energy is the energy that is stored in any item or system as a result of its location or component arrangement. The environment outside the object or system, such as air or height, has no impact on it. Conversely, kinetic energy is the force that propels the particles of an item or a system into motion.

Since light has no mass and is an example of electromagnetic radiation, it possesses neither kinetic nor potential energy. The remaining forms exhibit both kinetic and potential energy characteristics.

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Which of the following shows a valid combustion reaction?

2Al + 2O2 → 2AlO + O2
C2H4 + 3O2 → 2CO2 + 2H2O
2CH4 + O2 → 2CO + 4H2
Ca + O2 → CaOH

Answers

Answer:   C2H4 + 3O2 → 2CO2 + 2H2O

Explanation:

2Al + 2O2 → 2AlO + O2            Not Balanced Properly:  2Al + O2 = 2AlO  

C2H4 + 3O2 → 2CO2 + 2H2O  Looks Good

2CH4 + O2 → 2CO + 4H2          Not Correct:  CO should be CO2

Ca + O2 → CaOH                        Not Balanced and No source for the H

Answer:

2H4+3O2 →2CO2+2H2

Explanation:

What does the word "dutile" mean when used to refer to elements?

Answers

Answer:

capable of being hammered out thin, as certain metals; malleable.

Explanation:

What will happen to the density of the water if i put salt in it.

Answers

Answer:When salt is dissolved in fresh water, the density of the water increases because the mass of the water increases.

Explanation:

Of the four gases co2, h2o, n2, and o2, which are greenhouse gases?.

Answers

Answer:

h20, 02, and c02

Explanation:

an atom with 3 protons that loses an electron becomes…

Answers

Answer:

A +1 Ion of Lithium

Explanation:

Lithium has the atomic number of 3, therefore it has 3 protons

An electron has a negative charge, so losing an electron gives an atom a positive charge.

Answer:

Positive 1 ion of lithium

Explanation:

hope this helps!

is isopropyl alcohol the same as hydrogen peroxide

Answers

Answer:

Unlike isopropanol, hydrogen peroxide is not a type of alcohol. You might recognize its chemical formula, H2O2, as being similar to that of water (H2O). The difference is that hydrogen peroxide has two oxygen atoms instead of one. That one extra oxygen atom makes it a strong oxidizer.

what do you mean by blood pressure is 130 19 mm of HG​

Answers

Answer:

Hypertension stage 1 is 130-139 mm of HG

When a gas is collected over water, the partial pressure of water must be subtracted from the total pressure. If the total pressure was 761 mmHg and the pressure for water is 17.2 torr, what is the pressure due to the gas collected

Answers

Answer is: the partial pressure of the hydrogen 500 mmHg.

p(total) = 523.8 mmHg.

p(water) = 23.8 mmHg.

p(total) = m(water) + p(hydrogen).

p(hydrogen) = p(total) - p(water)..

p(hydrogen) = 523.8 mmHg - 23.8 mmHg.

p(hydrogen) = 500 mmHg.

mmHg or millimeter of mercury is a manometric unit of pressure.

What does it mean when an element turns into an ion?.

Answers

Answer:

When a neutral atom gains one or more electrons, the number of electrons increases while the number of protons in the nucleus remains the same. The result is that the atom becomes an anion—an ion with a net negative charge.

Explanation:

A compound contains 70% by mass of iron and 30% by mass of oxygen.
What is its empirical formula?
(A: 0, 16; Fe, 56]

Answers

Answer:

FeO₂

Explanation:

hAVE A nice day

Explanation:

If we assume it's FexOy

Fe : O

70 : 30. (mass ratio)

x:y = 70/56 : 30/16. (mole ratio)

1.25 : 1.875

= 1.25/1.25: 1.875/1.25

= 1 : 1.5

=2 : 3

Therefore It's Fe2O3

Two chemical reactions are shown:
A. Ca(OH)2 - CaO + H2O
B. 4K + O2 + 2K20
Which statement is true?

A. Both are synthesis reactions
B. Both are decomposition reactions
C. A is a synthesis reaction, and B is a decomposition reaction
D. A is a decomposition reaction, and B is a synthesis reaction

Answers

Answer: A is a decomposition reaction, and B is a synthesis reaction

Explanation: the first equation shows the reactant breaking up into 2 parts aka decomposition and equation 2 shows the reaction being combined into one part, aka synthesis. hope that helps!

Answer:

Answer d

Explanation:

PLZ HELP!!!

What are 3 genetic disorders caused by either missing or extra chromosomes? In your own words, provide a brief short explanation of what causes the disorder and some potential symptoms.

BEST ANSWER WILL BE MARKED AS BRAINLIEST!!!

Answers

Answer:

Humans have 23 pairs of chromosomes.

A trisomy is a chromosomal condition characterised by an additional chromosome.

A person with a trisomy has 47 chromosomes instead of 46.

Down syndrome, Edward syndrome and Patau syndrome are the most common forms of trisomy.

Explanation:

An electrochemical cell operates because the electrodes in the two half-cells differ in their electrical potential. A metal electrode composed of ______ reducing agent will have a greater electrical potential to push electrons toward the electrode composed of a ______ reducing agent.

Answers

A metal electrode composed of  strong reducing agent will have a greater

electrical potential to push electrons toward the electrode composed of a

weak reducing agent.

Strong reducing agents are compounds which donates or loses electrons

with a corresponding increase in the oxidation state. Weak reducing agents

can also be referred to as oxidizing agents and they accept the electrons

from the strong reducing agents which results in a reduction in the oxidation

state.

The strong reducing agent has a greater electric potential which aids the

electrons being pushed towards the electrodes with a weak reducing agent.

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how many outer boundaries does a animal cell have

Answers

Answer:

The plasma membrane.

Explanation:

membrane, in biology, the thin layer that forms the outer boundary of a living cell or of an internal cell compartment. The outer boundary is the plasma membrane, and the compartments enclosed by internal membranes are called organelles.

In your own words, explain why it is necessary to include only one chain-terminating/ synthesis-terminating nucleotide in each well of the electrophoresis instrument.

Answers

Answer: DNA sequencing methods employ chain termination nucleotides. Furthermore, if two chain-terminating nucleotides are employed in the same well, determining which strand is ended by which dideoxynucleotide will be impossible.

(its my own words, but i did search it to get this answer, hope it helps!)

Chain termination nucleotides are used in DNA sequencing techniques.Furthermore, it will be impossible to tell which strand is terminated by which dideoxynucleotide if two chain-terminating nucleotides are used in the same well.

Why is it necessary to include only one chain terminating synthesis terminating nucleotide?Only a limited subset of molecules will randomly incorporate dideoxynucleotides when the terminating nucleotide is added in small amounts. All permutations of termination can be achieved because different chain-terminating nucleotides are utilized in the four sequencing procedures.

What is a synthesis terminating nucleotide?Synthesis comes to an end when a ddNTP is added to a chain of nucleotides. This is due to the ddNTP molecule's absence of the 3' hydroxyl group needed to bind to the subsequent nucleotide in the chain.

What is chain termination method of DNA sequencing?The "chain termination method," often known as Sanger sequencing, is a technique for figuring out the nucleotide sequence of DNA. The Sanger Sequence is a method that was created in 1977 by two-time Nobel laureate Frederick Sanger and his colleagues.

What is the purpose of terminating the replicated strands?When two replication forks with opposing polarities come together and combine to form two independent, fully formed double-stranded DNA molecules, DNA replication is stopped.

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What are the diffrent types of chemical reactions?​

Answers

A chemical reaction is a process that can lead to a change of state, the outcome of a chemical reaction can ultimately lead to the formation of a new substance.

Types of Chemical ReactionsSynthesis reactionsDecomposition reactionsSingle-replacement reactionsDouble-replacement reactionsCombustion reactions.

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Use the periodic table to identify the number of valence electrons available for bonding for each of the following elements.

C :
H:
N:

O:
P:
CI:

Answers

Answer:

Look at the screenshot below.

Those are your answers!

Good Luck.

Explanation:

The number of valence electrons for neutral atoms is the same as the number of the atom's main group.A periodic table element's column can be used to determine its main group number.For instance, carbon, which belongs to group 4, has four valence electrons.

Use the periodic table to identify the number of valence electrons available for bonding for each of the following elements?

This rule states that each group of elements has one valence electron, two valence electrons in group 2, three valence electrons in group 13, four valence electrons in group 14, and so on. C   :  Six electrons make up the atom of carbon: four valence (outermost shell) electrons in the 2s and 2p orbitals, and two inner shell (core) electrons in the 1s orbital. H  :  As the initial element, hydrogen has an electron configuration of 1s1.Its valence shell only contains one electron.The outermost electrons or those with the highest energy level are called valence electrons. N :  The periodic table's Group 15 is headed by nitrogen, which has either 3 or 5 valence electrons. O :  On the periodic table, column 6 contains oxygen (symbol O).Its valence electrons number six.To obtain an octet, two bonds must be created. Ci  :  If chlorine removes one of its seven valence electrons, it will have eight (an octet).When chlorine gains one electron, its electron configuration resembles that of argon.If chlorine had given up all seven of its valence electrons and sodium had taken them, the octet rule would have been met.

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Which option is a key point of cell theory? Cells can repair neighboring cells, but not themselves.Cells can repair neighboring cells, but not themselves. , , Cells are the basic structural unit of all living organisms.Cells are the basic structural unit of all living organisms. , , All cells that make up an organism are similar to each other.All cells that make up an organism are similar to each other. , , Some cells can burn food molecules to release energy, but some cannot.

Answers

Answer:

Cells are the basic structural unit of all living organisms.

Explanation:

Hope this helps, but i'm unsure if it would be multiple choice or not.

What is the correct formula for tetraphosphorous octaoxide
P4O10
P4O8
Ph4O8
P5O8

Answers

P_4O_8

How?

Let's learn how to create name of compound from its name.

Look below for root words

2-di 3-tri4-tetra5-pent6-hex7-hept8-oct9-non10-dec

Hence formula of the compound is P4O8

What is the amount, in mol, of 15g of carbonate ions, C03^2-​

Answers

24 electrons.............

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Greenhouse gases include carbon dioxide and methane. Which of the following goals is included in the initiatives created by the United Nations Environment Programme? A. the reduction of carbon emissions by 80% by 2050 B. the reduction of the population growth rate by 10% by 2050 C. trade embargoes against nations that fail to conserve resources D. changes that will limit global warming to 1 F by 2050 Please select the best answer from the choices provided. A B C D 4) A company manufactures widgets. The expense function E=8q+12,000 and thedemand function q= -10p +20,000, where p is the price.a. Express the variable expense V in terms of q, where q is the quantity of widgetsproducedb. Express the total expenso E in terms of p.c. Determine the Revenue R in terms of p. (Hint: R=pq).d. Determine the profit P in terms of p. (Hint: P=R-E).e. Determine the price that will yield the maximum profit. (Hint: x = -b/2a).f. Determine the maximum profit. What are the names of the methods which are used to control an i/o device??. state the functions of vitamin d Find the area of the parallelogram. b = 90 ft h = 2 yd The area of the parallelogram is __ft or __yd. Find the value of the variable(s) in each figure explain your reasoning. I need help ASAP no links and no tricks the one who answers correctly I will mark brainiest. If I got #5 wrong let me know and tell me the right answer and show your work. Ty for ur help a key shift after 1800 among most american evangelicals was an embrace of ______. Select the correct text in the passage. In this speech by Patrick Henry, he tries to convince his fellow Virginians that they should oppose the British government and become independent. In which set of sentences does he most clearly state his commitment to seeking independence? Solve by elimination Solve by elimination or substitution: 4x + 2y = 6 and x - 3y = 5 (ill give brainliest)Use this picture to explain that an electrically charged object can attract an uncharged object without any contact. Your answer should be at least three sentences long. I need help for 2. Can someone help me. Ten less than the product of a number and 45. a letter to your aunt seeking permission to spend Christmas with her 200 words please help!!!i need nouns, simile, metaphors, onomatopoeia, and hyperbole The equation y=15x+12 is the slope-intercept form of which equation?5x+13y4=05 x plus 1 third y minus 4 is equal to 0y15+12=xnegative y over 15 plus 12 is equal to xy5x=4y minus 5 x is equal to negative 4y15x=12 A particular variety of bamboo grows for 4 months out of the year at a rate of 3 inches per day. The rest of the year, the bamboo is dormant and does not grow.A graph of the growth for a 12-month period is shown.What is the domain of the function that models this phenomenon? solve pls brainliest Transformed bacteria are plated on LB plus ampicillin to determine which cells were successfully transformed. Which part of the pGLO plasmid is responsible for the growth of transformed cells despite the presence of ampicillin