The specific heat of a certain type of cooking oil is 1.75 cal/(g ·°C). How much heat energy is needed to raise the temperature of 2.50 kg of this oil from 23 ∘C to 191 ∘C?

Answers

Answer 1

637,980 Joules is needed to raise the temperature of 2.50 kg of this oil from 23 ∘C to 191 ∘C.

What is specific heat?

The heat in calories required to raise the temperature of one gram of a substance one degree Celsius.

Q = cmΔT

where

Q = heat energy needed for that material to get desired temperature change (in Joules)

M = mass (in grams) so you have to convert from kilograms.

c = specific heat constant for the material being heated

ΔT = change in temperature

Q = (1.75)(2.17 x 1000)(191 - 23)

Q = (1.75)(2170)(168)

Q = 637,980 Joules

Hence, 637,980 Joules is needed to raise the temperature of 2.50 kg of this oil from 23 ∘C to 191 ∘C.

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Related Questions

What part of the scientific method involves controlling variables while testing a hypothesis? (2 points) Select one: a. Analyzing data b. Conducting an experiment c. Drawing a conclusion d. Making observations

Answers

Answer:

D

Explanation:

best choice, makes the most sense

In the scientific method, conducting an experiment involves designing and performing controlled experiments to test a hypothesis and the correct option is option B.

Scientists manipulate the independent variable while controlling other variables (dependent and controlled variables) to observe and measure the effect on the dependent variable.

By controlling variables, scientists can isolate the factors that influence the outcome, ensuring that any observed changes are a result of the manipulated variable and not other unrelated factors. This step allows for the collection of reliable data, which is essential for drawing meaningful conclusions based on the evidence gathered from the experiment.

Thus, the ideal selection is option B.

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25g of gold with initially 27grade centigrade what is the final temperature uppon absorbing 2.3kj of heat

Answers

The final temperature of the mass of gold is  737 °C.

What is the specific heat capacity of gold?

The specific heat capacity of gold is 0.126 J/g/K

The final temperature, T2 of the gold is calculated as follows:

T2 = T + Q/mc

where;

T is initial temperature, m is mass, and c is specific heat capacity of gold.

T2 = 27 + 2.3 x 1000/(25 x 0.126)

T2 = 737 °C

Therefore, the mass and heat capacity of gold determines its final temperature.

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3.4x10^4=
In ordinary numbers

Answers

3.4x10^4 = 34000

3.4×104 = 3.4 ×10000 = 34×1000=34000

What is a ordinary number?

In linguistics, ordinal integers or ordinal digit words are terms representing place or rank in sequential ordering; the order may be of a size, significance, record, and so on (e.g., "third", "tertiary").

They vary from cardinal digits, which mean quantity (e.g., "three") and other kinds of numerals.

Thus, 34000 is the answer.

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What is Lewis symbol for K+

Answers

Lewis symbol for K+ is given by a dot and K.

Meaning of Lewis symbol

Lewis symbols can be defined as a symbol the is used in describing the valence electron configurations of an atom ions.

A Lewis symbol consists of the symbol of the element and then surrounded by one dot for each of its valence electrons.

In conclusion, Lewis symbol for K+ is given by a dot and K.

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how do biotic components interact with abiotic components? explain with example.

Answers

Answer:

An ecosystem is defined by the interactions between the living and non-living things in any given area. Abiotic factors are the non-living components of an ecosystem. These include: air water, wind, soil, temperature, sunlight. One of the most critical interactions in an ecosystem between the biotic and abiotic environment is photosynthesis , the base chemical reaction that drives most life on earth. Plants and algae use sunlight, water and carbon dioxide to create the energy they need to grow and live via photosynthesis.

There are four main types of species interactions that occur between organisms in an ecosystem:

Predation , parasitism and herbivory – In these interactions, one organism benefits while the other is negatively affected.

* Competition – Both organisms are negatively affected in some way due to their interactions.

* Commensalism – One organism benefits while the other is neither harmed nor gains.

* Mutualism – Both organisms benefit from their interactions.

Plants with bird or butterfly pollinators are good examples of mutualistic interactions. Plants benefit by having their flowers pollinated so they can reproduce.

How many total atoms are in 0.680 g of P₂O5?

Answers

Answer: 2.88×[tex]10^{24}[/tex]atoms [tex]P_{2}O_{5}[/tex]

Explanation: First, using stoichiometry, we must convert this from grams to moles, then from moles to atoms.

1. For the first step, we should also look at the periodic table to find the molar mass of the compound, then use that as the denominator.

[tex]0.680g P_{2} O_{5} *\frac{1molP_{2} O_{5} }{141.948gP_{2} O_{5} } =4.79mol P_{2} O_{5}[/tex]

2. Now that it is converted to moles, we must convert it to atoms by multiplying it by Avogadro's number.

[tex]4.79molP_{2} O_{5} *\frac{6.022X10^{23} }{1mol} =2.88*10^{24}[/tex]

With this information, we know that there are [tex]2.88X10^{24}[/tex] total atoms in 0.680 grams [tex]P_{2} O_{5}[/tex].

I hope this helps! Pls give brainliest!! :)

Calculate the osmotic pressure of a 5% solution of glucose at 18°C.​

Answers

Answer:

6.97 atm is the osmotic pressure.

screen shot is attached , please help

Answers

Answer: 0.680 mol

Explanation:

From the coefficients of the equation, we know that for every 3 moles of carbon dioxide produced, 5 moles of oxygen gas are consumed.

So, the answer is (5/3)(0.408) = 0.680 mol (to 3 sf)

4. It is desired to prepare 0.5 L of a 0.1 M solution of NaCl
from a 1 M stock solution. How many milliliters of the
stock solution must be taken for the dilution?
5. Calculate the osmotic pressure of a 0.5 M sucrose
solution if the temperature is 298 K.

Answers

4) 0.05 L of the stock solution must be taken.

5) The osmotic pressure would be 12.23 atm

Miscellaneous calculations

4) Using the dilution equation: m1v1=m2v2

   m1 = 1M, m2 = 0.1M, v2 = 0.5L

      v1 = m2v2/m1 = 0.1 x 0.5/1 = 0.05 L

5) Using the formula: osmotic pressure = icRT

 Since sucrose does not ionize in water,  i = 1

  C = 0.5

  R = 0.0821

  T = 298

  Osmotic pressure = 1 x 0.5 x 0.0821 x 298 = 12.23 atm

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5pts. Chemistry multiple choice​

Answers

Answer:

C. Xenon

Explanation:

The question only requires you to use your visual skills to identify the unknown gas. Look at the spectra of unknown gas and xenon, are they not identical? SInce they are same, the unknown sample must be xenon.

C. Xenon // they both look alike

4Al(s) + 30₂(g) → 2Al2O3 (s)
How many molecules of O₂ are used in the reaction?
How many oxygen atoms are required?
How many moles of Al2O3 are formed?
What is the mole ratio of Al to O₂?

Answers

1) 1 molecules
2) 2 oxygen atoms
3)2 moles of Al2O3 are formed
4)4:3

how does resistance change with temperature? is there more resistance or less resistance at higher temperatures?

Answers

The resistance has a linear relationship with temperature because it increases as temperatures increases.

What is temperature?

Temperature refers to the activity (motion or thermal energy) in the atoms that form molecules.

The resistance of an electric conductor increases as the temperature increases since the thermal energy of subatomic electrons also increases.

In conclusion, the resistance has a linear relationship with temperature because it increases as temperatures increases.

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Suppose 0.258g of lead(II) acetate is dissolved in 250.mL of a 13.0 m M aqueous solution of ammonium sulfate.

Calculate the final molarity of acetate anion in the solution. You can assume the volume of the solution doesn't change when the lead(II) acetate is dissolved in it.

Round your answer to 3 significant digits.

Answers

Molarity is the estimation of the solute concentration in the solution. The final molar concentration of the acetate anion in the solution is 0.006 M.

What is Molarity?

Molarity is the ratio of the moles to the volume in liters.

Given,

Mass of lead (II) acetate = 0.258 gm

Volume of solution = 0.25 L

Moles are calculated as:

Moles = mass ÷ molar mass

= 0.258 g ÷ 325.29 g/mol

= 0.00079

Molarity is calculated as:

M = moles ÷ volume

= 0.00079 ÷ 0.25

= 0.0032

The molar concentration of the acetate ions: 2 × 0.0032 = 0.0064 M

Therefore, the molarity of the acetate anion in the solution is 0.006 M.

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Question 21
How many moles of O atoms are in 88 grams of CO₂?
2.8 moles
6.0 moles
1.00 moles
2.0 moles
4.0 moles

Answers

There are 2 moles of O stones present in 88 grams of CO2. Why? Well, we can find the amount of moles present in 88 grams of CO2 by dividing the mass by the molar mass. The mass of CO2 comes out to be 88 grams. The molar mass of CO2 comes out to be 44 grams. Because 88 is the mass of CO2 and 44 is the molar mass of CO2, we can divide 88 by 44 to identify that there are 2.0 moles of O atoms present in 88 grams of CO2.

Your final answer: There are 2.0 moles of O atoms present in 88 grams of CO2. Your final answer to this question is D, or 2.0 moles. If you need to better understand, let me know and I will gladly assist you.

Sulfuryl chloride, SO2Cl2(g), decomposes at high temperature to form SO2(g) and
Cl2(g). The rate constant at a certain temperature is 4.68 x 10-5s-1. What is the the order of the reaction?
A) zero
B) first
C) second
D) third
E) More information is needed to determine the order.

Answers

The rate constant is s-1 which is the unit of first order reaction rate constant thus the reaction is a first order reaction. Option B

What is the rate of reaction?

The term rate of reaction refers to how fast or slow a reaction proceeds a reaction could be;

First orderSecond order or Third order

We can know the order of reaction here by looking at the unit of the rate constant. The rate constant is s-1 which is the unit of first order reaction rate constant thus the reaction is a first order reaction.

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what are correct statements about all greenhouse gases? check all that apply.

Answers

The correct statements about all greenhouse gases include the following:

They interact with wavelengths shorter than IR to produce IR. Their absorption spectra will show absorbance in the 400-700 nm region. What is greenhouse gas?

These are gases which are found in the atmosphere and have varying effects on the energy present on earth.

Examples include carbon dioxide, methane etc and their characteristics are mentioned above.

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It takes 5.4 kJ to vaporize 1.6 moles of substance Z. What is the molar heat of vaporization of substance Z? Give your answer in units of kJ/mol with correct significant figures.

Answers

The molar heat of vaporization of substance Z is 3.375 kJ/mol.

Molar heat of vaporization of substance Z

The molar heat of vaporization of substance Z is calculated as follows;

ΔH(vap) = E/n

where;

E is the energy requiredn is number of moles

ΔH(vap) = 5.4 kJ/1.6

ΔH(vap) = 3.375 kJ/mol

Thus, the molar heat of vaporization of substance Z is 3.375 kJ/mol.

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A 0.250 L solution is made with 1.60 g of glucose, in water at 25.00∘C. What is the osmotic pressure of the solution?
Use −273.15∘C for absolute zero.
Use R=0.08206 L atmmol K for the ideal gas constant

Answers

The osmotic pressure of the 0.250 L solution made with 1.60 g of glucose, in water at 25.00°C is 0.869atm.

How to calculate osmotic pressure?

The osmotic pressure of the solution can be calculated using the following expression:

PV = nRT

where;

P = pressureV = volumen = no of molesT = temperatureR = gas law constant

no of moles of glucose = 1.60g ÷ 180g/mol = 8.89 × 10-³mol

P × 0.250 = 0.00889 × 0.08206 × 298

0.25P = 0.217

P = 0.217/0.25

P = 0.869atm

Therefore, the osmotic pressure of the 0.250 L solution made with 1.60 g of glucose, in water at 25.00°C is 0.869atm.

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What’s the correct answer answer asap for brainlist

Answers

The equator runs through the middle of Africa!

Do the ch3f molecules appear to attract each other much? briefly describe their interaction.

Answers

Neither attract much nor allows it be free.

How the molecules behave in such way?

Because fluorine has a higher electronegativity than carbon and hydrogen, CH3F possesses a non-zero dipole moment. As a result, fluorine draws a partial negative charge whereas other atoms (such as carbon or hydrogen) draw a partial positive charge, leading to a non-zero dipole moment in CH3F. Lewis' structure, CH3F, is made up of one carbon atom, three hydrogen atoms, and one fluorine atom. Carbon is the key atom in the CH3F lewis structure because it is the least electronegative. The CH3F lewis dot structure consists of 3 lone pairs and a total of 4 bound pairs.

Properties of CH3F

It molar mass is 34.03 g/mol.The density of CH3F is 1.4397 g/L and 0.557 g/cm³ at saturated pressure and temperature.The melting point of CH3F is -137.8ºC and the Boiling point is -78.4ºC.Its vapor pressure is 3.3 MPa.Its IUPAC name is Fluoromethane.

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what are the rules guiding iupac nomenclature?​

Answers

Rules of iupac nomenclature are :-

Find and name the longest continuous carbon chain.

Identify and name groups attached to this chain.

Number the chain consecutively, starting at the end nearest a substituent group.

Designate the location of each substituent group by an appropriate number and name.

Explanation:

Hope it helps you!!

How many kilograms of NH3 are needed to produce 120 of pf3 if the reaction has 78.1% yield.

Answers

99.25 grams = .09925 Kg of fluorine gas is needed.

What are moles?

A mole is defined as 6.02214076 × [tex]10^{23}[/tex]of some chemical unit, be it atoms, molecules, ions, or others. The mole is a convenient unit to use because of the great number of atoms, molecules, or others in any substance.

Balanced chemical reaction: P₄ (s) + 6F₂ (g) → 4PF₃ (g).

m(PF₃) = 120.0 g; mass of phosphorus trifluoride.

n(PF₃) = m(PF₃) ÷ M(PF₃).

n(PF₃) = 120 g ÷ 88 g/mol.

n(PF₃) = 1.36 mol.

From chemical reaction: n(PF₃) : n(F₂) = 4 : 6 (2 : 3).

n(F₂) = 1.36 mol · 3 / 2.

n(F₂) = 2.04 mol; amount of substance.

m(F₂) = n(F₂) · M(F₂).

m(F₂) = 2.04 mol · 38 g/mol.

m(F₂) = 77.52 g ÷ 0.781.

m(F₂) = 99.25 g.

Hence, 99.25 grams = .09925 Kg of fluorine gas is needed.

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How many formula units are in 239.2g of
Br2
MgCl2
H2O
Fe

Answers

The formula units in the substances are as follows:

Br2 = 8.99 × 10^23 formula unitsMgCl2 = 1.51 × 10^24 formula unitsH2O = 2.57 × 10^24 formula unitsFe = 2.57 × 10^24 formula units

How many moles are in 239.2 g of the given substances?

The moles of the substances are determined from their molar mass.

Molar mass of the substances is given as follows:

Br2 = 160 g/molMgCl2 = 95 g/molH2O = 18 g/molFe = 56 g/mol

Formula units = mass/molar mass × 6.02 × 10^23

The formula units in the substances are as follows:

Br2 = 239.2/160 × 6.02 × 10^23 = 8.99 × 10^23 formula unitsMgCl2 = 239.2/95 × 6.02 × 10^23 = 1.51 × 10^24 formula unitsH2O = 239.2/18 × 6.02 × 10^23 = 2.57 × 10^24 formula unitsFe = 239.2/56 × 6.02 × 10^23 = 2.57 × 10^24 formula units

In conclusion, the number of formula units is derived from the moles and Avogadro number.

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The sparse area surrounding a spiral galaxy is called its

Answers

Answer:

Halo

Explanation:

what are the relevant equations for oxidation and reduction

Answers

Answer:

There are many equations for oxidation and reduction, but the most relevant ones are the equations for the half-reactions. In general, the equation for oxidation is:

Oxidation: Reducing Agent + O2 → Oxidizing Agent

And the equation for reduction is:

Reduction: Oxidizing Agent + e- → Reducing Agent

These equations show the transfer of electrons that occurs during oxidation and reduction.

Explanation:

how many moles of pbcl2 are produced when 16 alcl3 are consumed

Answers

Using dimensional analysis and the mole ratios from the balanced equation, we can calculate moles of PbCl2 formed from 14 moles of AlCl3.

Which of the following has eight valence electrons?
o ti4+
CI
Na+
O Kr
O all of the above

Answers

it’s all of the above

Answer:

all of the above

Vehicle air bags require that a very specific amount of gas is created so that the gas inflates the airbag without causing it to rupture.
Commonly, this is accomplished by decomposing sodium azide (NaN3) to produce sodium metal and nitrogen gas. How much sodium azide is required to produce 80.0 g of nitrogen gas?

Answers

The amount of sodium azide required will be 123.72 grams

Stoichiometric problem

From the equation of the reaction below:

[tex]2NaN_3 --- > 2Na + 3N_2[/tex]

The mole ratio of sodium azide to nitrogen gas is 2:3

Mole of 80.0 g nitrogen = 80/28.02 = 2.855 moles

Equivalent mole of sodium azide = 2/3 x 2.855 = 1.903 moles

Mass of 1.903 moles sodium azide = 1.903 x 65 = 123.72 grams

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What will the cleaning sanitation and storage of food contact surfaces of equipment and utensils help prevent?

Answers

Proper cleaning and sanitizing practices are critical in preventing bacteria that can cause foodborne illness.

Benefits of sanitizing:

Eliminates Pathogens.

Sanitizing Improves Home Odor.

Reduces Respiratory issues.

Decreases Allergy Flare-Ups.

Easy to Use.

Reduces Stress.

Helps the Immune System.

When and how to clean surfaces in your home.

Important to clean and sanitize kitchen premises

Cleaning your kitchen premises and equipment ensures that clean food preparation is carried out in order to improve kitchen efficiency and reduce environmental impacts.

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Place a check mark next to each star that is only fusing hydrogen into helium at this time.

Answers

Answer:

star 3

Explanation:

the color determines the fusion in between

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