Lec 29 Entropy

Question 1

What type of function is entropy

Answer 1

State function

Question 2

What is entropy

What are its units

Answer 2

Dispersal of matter and energy

(More combinations, more entropy)

J

Question 3

Going from higher to lower entropy is spont or no spont?

What about low to high

Answer 3

Non spont

Spont

Question 4

What is the second law of thermodynamics

Answer 4

For spontaneous proccess, entropy of universe must increase always

(Change always happens in direction of max entropy)

This law only tells us about Suniverse not Ssystem

Question 5

When is s universe at a max and delta s equal 0

Answer 5

When system is at equilibrium

Question 6

What factors affect entropy

Answer 6

Volume change of gas (more possible positions for each particle, more micro states)

Temp change: more possible energy with each particle, more possible distribution for particles

Phase changes (at constant temp):
Solid<liquid<gas

Mixing: mixing solutions increases entropy, but dissolving decreases

Increasing mols of gas:
More arrangements to more dispersal and entropy