A student places three ice cubes in a beaker and allows them to partially melt. If she measures the temperature of the water in the beaker, what will she most likely observe? Explain your answer.

Answers

Answer 1

Answers to the whole assignment:

**Check for proof photos at the bottom.**

**Answers are in bold.**

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A student places three ice cubes in a beaker and allows them to partially melt. If she measures the temperature of the water in the beaker, what will she most likely observe? Explain your answer.

She will see that the temperature of the water is 0 degrees Celsius and it stays at that temperature until all the ice cubes completely melt.

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Use the table on the right to calculate each required quantity. Record values to 3 significant digits.

First answer: 35.8 kJ

Second answer: 871 g

Third answer: Fe

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An iron sphere with a mass of 75.00 g is heated to a temperature of 385.0°C. It is then placed in a beaker containing 150.0 g H2O at 100.0°C.

First answer: 339 kJ

Second answer: 9.02 kJ

Third answer: No

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A sample of water has a mass of 100.0 g. Calculate the amount of heat required to change the sample from ice at –45.00°C to water vapor at 175.0°C. Relevant constant values are given to the right.

First answer: 325 kJ

Second answer: boiling the water

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Identify the correct description for each part labeled on the diagram.

A: ✔ heating solid

B: ✔ melting

C: ✔ heating liquid

D: ✔ boiling

E: ✔ heating gas

F: ✔ melting point

G: ✔ boiling point

Where are the particles closest together?

✔ A

Explanation:

When ice partially melts, the surrounding water remains at 0° Celsius. This is because ice melting only involves the water molecules overcoming intermolecular forces, or forces holding molecules together. The water molecules themselves aren't increasing in kinetic energy when turning into liquid. Since temperature measures kinetic energy, the temperature in this case, remains at 0°.

To find how much energy it takes to cause a phase change in a substance, you must find the number of moles, and determine whether to use ΔHvap and ΔHfus. ΔHvap is used to show how much energy is involved in evaporation and condensation, and ΔHfus is the same but used for melting and freezing. To find number of moles of a given substance, use the formula: mass of given substance divided by atomic mass. Both numbers have to use the same mass unit. Then, multiply number of moles by ΔHvap or ΔHfus to get kJ.

In a heating curve graph, the flat lines represent no change in energy, or the phase changes. The steep lines are change in energy, which are either heating or cooling. The bottom line is a heating/cooling solid. A heating/cooling solid is the coldest phase, which is why the line is at the bottom.

Here are photos of Edge to make things easier.

A Student Places Three Ice Cubes In A Beaker And Allows Them To Partially Melt. If She Measures The Temperature

Related Questions

A flexible camping tank has a sample of butane gas at 17.2 atm and has volume of 6.5L. What will be the volume if the pressure is adjusted to
6.4 atm?

Answers

Answer:

If the pressure is adjusted to 6.4 atm, the volume will be 17.47 atm.

Explanation:

Boyle's law says that the volume occupied by a given gaseous mass at constant temperature is inversely proportional to pressure. That is, if the pressure increases, the volume decreases while if the pressure decreases, the volume increases.

Mathematically, Boyle's law indicates that the product of pressure and volume always has the same value:

P*V= k

Analyzing an initial state 1 and a final state 2, it is satisfied:

P1*V1= P2*V2

In this case:

P1= 17.2 atmV1= 6.5 LP2= 6.4 atmV2= ?

Replacing:

17.2 atm* 6.5 L= 6.4 atm* V2

Solving:

[tex]V2=\frac{17.2atm*6.5 L}{6.4 atm}[/tex]

V2=17.47 L

If the pressure is adjusted to 6.4 atm, the volume will be 17.47 atm.

Calculate the current in amperes required to produce 18.0g of aluminium in 1.50hrs (al=27.og )

Answers

Answer:

35.7 A

Explanation:

Let's consider the reduction half-reaction of Al³⁺.

Al³⁺ + 3 e⁻ ⇒ Al

We will calculate the charge required to produce 18.0 g of Al using the following conversion factors.

1 mole of Al has a mass of 27.0 g1 mole of Al is formed upon the circulation of 3 moles of electrons1 mole of electrons has a charge of 96486 C (Faraday's constant)

[tex]18.0gAl \times \frac{1molAl}{27.0gAl} \times \frac{3mole^{-} }{1molAl} \times \frac{96486C}{1mole^{-} } = 1.93 \times 10^{5} C[/tex]

1.93 × 10⁵ C circulate in 1.50 hours. The intensity is:

[tex]I = \frac{1.93 \times 10^{5} C}{1.50h} \times \frac{1h}{3600s} = 35.7 A[/tex]

In your OWN words, what is the difference between a solute, solvent, and solution?

Answers

Answer:A solution is a homogeneous mixture consisting of a solute dissolved into a solvent . The solute is the substance that is being dissolved, while the solvent is the dissolving medium.

Explanation:A solution is a homogeneous mixture consisting of a solute dissolved into a solvent . The solute is the substance that is being dissolved, while the solvent is the dissolving medium.

PLEASEEEEE CAN SOMEONE HELP MEEE??? (iI have TWO questions PLSPLSPLSPSLPLSPLSPLSP)

3.) What happened to Patroclus at the end of yesterday's reading?

He won the battle.

He went to Mt. Olympus to talk to Zeus.

He died.

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4.Who was Agamemnon trying to persuade to come fight with him again?

Patroclus

Achilles

Odysseus

Hector

Pls answer this question 19 pls

Answers

Answer: The one direction where energy as heat will be initially transferred between the blocks is from block D to block A.

Explanation:

A substance like metal box that has high temperature will have more kinetic energy between its molecules due to which there will be more number of collisions between them.

Hence, it is able to transfer its heat energy more readily ac compared to a substance with low heat energy.

As a result, in the given diagram as temperature is increasing from block A to block B so heat energy will be transferred from block D to block A.

Thus, we can conclude that one direction where energy as heat will be initially transferred between the blocks is from block D to block A.

Which of the following steps correctly converts 3 moles of fluorine to an equivalent number of particles of fluorine?

Group of answer choices

Divide Avogadro's number by 3.

Multiply 3 by Avogadro's number.

Multiply 3 by the atomic mass of fluorine.

Divide the atomic mass of fluorine by 3.

Answers

Answer:

B) Multiply 3 by Avogadro's number

Explanation:

This is according to Study.com

3 moles of fluorine contains 18.066✖10²³ Particles. thus, option B is correct

How many are there no. of particles in 1mole?

One mole contains 6.022✖10²³ particles.

3 moles of flourine contains 3✖6.022✖10²³ particles

Hence, option “B” is correct

learn more about moles.

https://brainly.com/question/26416088

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During photosynthesis, plants incorporate atmospheric
Cinto more complex energy-storage
molecules that increase the mass of the plants. Plants need sunlight for this process because plants transform light
energy into
energy stored in the molecules.

Answers

Answer:

carbon dioxide

oxygen

During photosynthesis, plants incorporate atmospheric pressure into more complex energy-storage molecules that increase the mass of the plants. Plants need sunlight for this process because plants transform light energy into chemical energy stored in the molecules.

What is Photosynthesis ?

It is the process by which plants , algae and some bacteria uses water from the carbon dioxide, air and soil and in this process food is prepared in the presence of chlorophyll and sunlight. In this process light energy converted to chemical energy.

Thus, we can say that During photosynthesis, plants incorporate atmospheric pressure into more complex energy-storage molecules that increase the mass of the plants. Plants need sunlight for this process because plants transform light energy into chemical energy stored in the molecules.

Learn more about the Photosynthesis here: https://brainly.com/question/19160081

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The one factor that a scientist changes during an experiment.

Answers

Answer:

The independent variable

What type of change occurs during a chemical reaction?

Please help with this , it’s very important

Answers

Explanation:

a) Cr is acid K is base

b) Ca is base and the other left part is acid

c)Ca is base and F2 is acid

= 18

Explanation:

3 L of a gas at 250 K is changed to a temperature of 300 K. What is the final volume?

Answers

Answer:

you can simply answer vl\t1=v2/t2

How do you think the human population has changed over time? What makes you say that?

Answers

Answer:The world population increased from 1 billion in 1800 to 7.7 billion today. The world population growth rate declined from 2.2% per year 50 years ago to 1.05% per year. Other relevant research: World population growth – This article is focusing on the history of population growth up to the present.

Explanation:

How symbols are made?

Answers

Answer:

Humans convert virtually all direct and indirect impressions into symbols. The symbols that humans create are words. Every word consists of two components, a denotative and a connotative (for a complete discussion of denotation and connotation see Chapter 7, THE POWER OF WORDS).

Explanation:

Answer:

Explanation:

Which element has 16 neutrons, 15 protons, and 15 electrons?

Answers

Answer:

phosphorus

Explanation:

Answer:

phosphorus

Explanation:

phosphorus has to lose electrons

Alkenes are more stable than alkanes. True or False

Answers

Answer:

Yes

Explanation:

Alkenes are relatively stable compounds, but are more reactive than alkanes because of the reactivity of the carbon–carbon π-bond. Most reactions of alkenes involve additions to this π bond, forming new single bonds.

The saturation point for a solution is 50.0 grams of solute per 500. grams of solvent. If you pour 70.0 grams of
solute into 800. grams of solvent, how many more grams of solute can you dissolve before reaching saturation?

Answers

Answer:

10.0g of solute before reaching saturation

Explanation:

A saturated solution is the solution that contains the maximum amount of solute that can be dissolved. In the problem, you can have

50.0g of solute / 500.0g Solvent

Now, in 800.0g solvent you can dissolve:

800.0g Solvent * (50.0g solute / 500.0g Solvent) = 80.0g of solute can be added

As you dissolve initially 70.0g of solute. You can add:

80.0g - 70.0g =

10.0g of solute before reaching saturation

Determine the molar masses for each of the following elements, compounds, or molecules. Remember to round to the proper amount of Sig Figs!

Cu(OH)2 _ g/mol
Na2WO4 _ g/mol
Pd _ g/mol
KMnO4 _ g/mol
NH3 _ g/mol

Answers

Answer:

Explanation:

Cu(OH)2 _97.65 g/mol

Na2WO4 _293.82 g/mol

Pd _106.42 g/mol

KMnO4 _158.03 g/mol

NH3 _17.03 g/mol

Answer:

Explanation:

round 2 4-figs:

Cu(OH)2 97.65 g/mol

Na2WO4 293.8 g/mol

Pd 106.4 g/mol

KMnO4 158.0 g/mol

NH3 17.03 g/mol

Convert 3.01×10 23 molecules of H2O to moles.

Answers

0.500 mole H2O.... i think

Which statement about pollination is
TRUE?

Flowers are always pollinated
by insects.

Pollen is always transferred
from the same flower

When pollination occurs.
pollen sticks to the anther.

When pollination occurs
pollen sticks to the stigma.

Answers

Answer:

D; the pollen sticks to the stigma

Explanation:

When a flower is pollinated, the pollen sticks to the stigma. However, it is not always pollinated by insects (birds and other factors can as well), pollen can be transferred from different flowers (as long as they're the same species) and pollination doesn't stick to the anther.

Answer:

Explanation:

because when pollution occurs than the insects move to the flower to sick nectar and then pollan giains stuck in the insect body

What volume of 2M NaOH is required to completely neutralize 25mL of 1M HCl?

Answers

Answer:

[tex]\boxed {\boxed {\sf 12.5 \ mL \ NaOH}}[/tex]

Explanation:

In a neutralization reaction, an acid and base react to form salt and water. The hydrogen ions (H+) and hydroxide ions (OH-) combine to form water, while the other spectator ions bond to make salt.

For this reaction, the acid is HCl (hydrochloric acid) and NaOH (sodium hydroxide).

The H (from HCl) and OH (from NaOH) combine to make water (HOH or H₂O). The other ions, Cl and Na combine to form NaCl or sodium chloride. Let's write the neutralization reaction.

[tex]HCl _{(aq)}+NaOH _{(aq)} \rightarrow NaCl _{(aq)} + H_2O _{(l)}[/tex]

Now let's perform the calculation. We should use the titration equation or:

[tex]M_AV_A= M_BV_B[/tex]

where M is the molarity of the acid or base and V is the volume.

We know there are 25 milliliters of 1 molar HCl (acid) and an unknown volume of 2 molar NaOH (base).

[tex]\bullet M_A= 1 \ M \\\bullet V_A= 25 \ mL \\\bullet M_B= 2 \ M[/tex]

Substitute the known values into the formula.

[tex]1 \ M * 25 \ mL = 2 \ M * V_B[/tex]

Since we are solving for the volume of the base, we must isolate the variabel. it is being multiplied by 2 M and the inverse of multiplication is division. Divide both sides by 2 M.

[tex]\frac { 1 \ M * 25 \ mL}{2 \ M }=\frac{2 \ M * V_B}{2 \ M}[/tex]

[tex]\frac { 1 \ M * 25 \ mL}{2 \ M }= V_B[/tex]

The units of M cancel.

[tex]\frac { 1 * 25 \ mL}{2 }=V_B[/tex]

[tex]\frac {25}{2} \ mL= V_B[/tex]

[tex]12.5 \ mL= V_B[/tex]

12.5 milliliters of 2 M sodium hydroxide are required to neutralize 25 mL of 1 M hydrochloric acid.

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