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Chemistry

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Alexandrine Jones

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Cards in this guide (15)
What does entropy measure

Entropy is the inclination for things to increase their level of disorder.

eg. If you buy a puzzle in a box and you shake it really hard the pieces become more disorganized, near fall back into their proper place.

APEX ANSWER: Entropy measures the disorder in a system

Which of the following is a statement of Hess's law

The enthalpy of reaction does not depend on the steps taken in the reaction.(Apex)

How does the phase of water affect its specific heat capacity

Liquid water has the highest specific heat capacity.

Which of the following describes the entropy change of a gas reaction

If there is an increase in the number of gas molecules, then S > 0.

What is the entropy of a solid based on

The arrangement of the atoms

What most determines the entropy of a solid

The crystalline structure of the solid most determine the entropy of a solid.

How does entropy change in gas reactions

Reactions that increase the moles of gas will increase in entropy.

What does the term spontaneous mean in chemical reactions

Occurring without added energy

What factors generally determine whether a reaction happens or not

Enthalpy and entropy.

Which of the following has the highest entropy Water Ice Water solution or Water vapor

water vapor

What is the value for G at 300 K if H 27 kJmol and S 0.09 kJmolK

G = 0 kJ/mol

What does S0 mean

the system has become more random

What is revealed in the reaction CaOH2s Ca2 aq 2OH-aq

The reaction produces heat.

What does the second law of thermodynamics say apex

The entropy of the universe is increasing

An aerospace engineer is designing a rocket to have three stages. Which is not a reasonable explanation for this decision

to simplify the design of the rocket.

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