Quiz 5

Question 1

What are the three laws of thermodynamics?

Answer 1

Energy never created or destroyed
Entropy of the universe increases in spontaneous, unchanged in equilibrium
Entropy of a perfect crystalline substance is zero at the absolute zero of temperature

Question 2

What is a system?

Answer 2

Substance of interest

Question 3

What are the surroundings?

Answer 3

All matter around the system

Question 4

What is an open system?

Answer 4

Exchanges matter and energy with surroundings

Question 5

What is a closed system?

Answer 5

Exchanges energy but not matter with surroundings

Question 6

What is one calorie?

Answer 6

Amount of heat required to raise 1g of H2O 1 degree

Question 7

What is q equal to?

Answer 7

q = mass X change in T X Specific heat

quantity of heat transfered

Question 8

What is a state function?

Answer 8

Doesn’t depend on how, only initial and final states

Question 9

What is the symbol for standard enthalpies?

Answer 9

Delta H

Question 10

What happens to Delta S when order goes up?

Answer 10

Goes down

Question 11

What happens to Delta S when disorder goes up?

Answer 11

Goes up

Question 12

What is delta S when more gas molecules are produced than consumed?

Answer 12

Greater than 0

Question 13

What is delta S when less gas molecules are produced than consumed?

Answer 13

Less than 0

Question 14

What is delta S when the net change of gas molecules is equal to zero?

Answer 14

Small positive or negative number

Question 15

What is the symbol for standard entropy?

Answer 15

Delta S

Question 16

What is the equation for gibbs-free energy?

Answer 16

G = H -TS

Question 17

What is the reaction when delta G < 0?

Answer 17

Spontaneous forward

Question 18

What is the reaction when delta G > 0?

Answer 18

Spontaneous Reverse

Question 19

What is the reaction when delta G = 0?

Answer 19

At equilibrium