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Chemistry

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Savanah Goldner

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2y ago
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Cards in this guide (12)
Where do trees get carbon dioxide

Out of the air. There is a lot of carbon dioxide in the air. You exhale carbon dioxide, because your cells use oxygen and turn it into carbon dioxide.

What kind of changes contribute to spontaneity

An increase in entropy.

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

G = 0 kJ/mol

Which is a statement of the second law of thermodynamics

Entropy tends to increase in a system.

How much energy is required to raise the temperature of 0.2 kg of aluminum from 15C to 18C

538 J

What describes the entropy change as a solution is made from a liquid to a solid

S > 0

What statements about airplane and rocket flight is true

Only one requires air molecules to generate lift.

A rocket uses an engine that creates thrust through the combustion of a liquid fuel and an oxidizer. What kind of rocket is this

Chemical rocket


What statement describes a reaction at 298 K if H 31 kJmol S 0.093 kJ(molK)

It is not spontaneous.

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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