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3 years ago

A student wants to measure the entropy of ice. What should the student do?

Chemistry

1 answer:

Helen [10]3 years ago

6 0

Answer: Option (c) is the correct answer.

Explanation:

Entropy is defined as the degree of randomness. This means that more is the number of collisions taking place between atoms of a substance more will be the randomness.

Therefore, more will be the entropy of substance. We cannot measure the entropy but we can measure the change in entropy of a substance.

A thermometer is a glass tube that contains a liquid column generally mercury, and it is usually used to measure the temperature of human body.

A calorimeter is a device or apparatus that is used in a chemical reaction to measure the amount of heat involved.

Therefore, we can conclude that the student can't measure entropy directly, only an entropy change.

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When hydrogen gas reacts with oxygen gas under certain conditions to produce liquid water, 572.0 kJ of heat energy is released.

frozen [14]

Answer : This reaction is an exothermic reaction.

Explanation :

Endothermic reaction : It is defined as the chemical reaction in which the energy is absorbed from the surrounding.

In the endothermic reaction, the energy of reactant are less than the energy of product.

Exothermic reaction : It is defined as the chemical reaction in which the energy is released into the surrounding.

In the exothermic reaction, the energy of reactant are more than the energy of product.

Enthalpy of reaction : It is the difference between the energy of product and the reactant. It is represented as $\Delta H$ .

The balanced chemical reaction will be:

$H_2(g)+O_2(g)\rightarrow H_2O(l)+572.0kJ$

From the reaction we conclude that the heat energy is released during the reaction that means this reaction is an exothermic reaction.

Hence, the reaction is an exothermic reaction.

7 0

3 years ago

How many kilojoules are equivalent to 10 joules?

miss Akunina [59]

1 Kj ------------- 1000 J
?? --------------- 10 J

10 x 1 / 1000 => 0.01 Kj

7 0

3 years ago

Chemical reactions occur when chemical bonds between atoms are formed or broken. reactants come together and produce a reaction

Sveta_85 [38]

What's the question? I don't understand where the problem is.

4 0

3 years ago

Roman mixes 12 liters of 8% acid solution with a 20% acid solution, which results in a 16% acid solution. Find the number of lit

inysia [295]

Let the 8% solution be A, the 20% solution be B and the final solution be C.

C = A + B
C = 12 + B

0.16C = 0.08(12) + 0.2(B)
0.16(12 + B) = 0.96 + 0.2B
0.96 = 0.04B
B = 24 Liters

C = 12 + 24
C = 36 Liters

3 0

3 years ago

What is the molecular formula of a compound containing 42.17% Chlorine, 57.83% Oxygen, and has a molecular mass of 166 g/mol?

Juliette [100K]

Answer:

C2H4CL2

Explanation:

this is your answer

6 0

3 years ago