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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 does a negative H tell about a reaction
The reaction is exothermic.
What form a spontaneous reaction at 298 K
H = 28 kJ/mol, S = 0.109 kJ/(molK)
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.
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
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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