Question 1

What is the symbol for entropy?

Accepted Answer

S

Answer

E

Answer

G

Answer

H

Question 2

Entropy is a measure of:

Accepted Answer

the disorder of a system

Answer

accuracy

Answer

the attraction of a nucleus for an electron

Answer

precision

Question 3

Which of these processes represents a decrease in entropy?

Accepted Answer

condensation of steam on cold glass

Answer

boiling water

Answer

NaCl dissolving in water

Answer

sublimation of CO₂

Question 4

The entropy will usually increase when:

Accepted Answer

all of these

Answer

a reaction occurs that results in an increase in the number of moles of gas

Answer

a solid changes to a liquid

Answer

a molecule is broken into two or more smaller molecules

Question 5

Systems in nature tend to undergo changes toward:

Accepted Answer

lower energy and more disorder

Answer

higher energy and more disorder

Answer

higher energy and less disorder

Answer

lower energy and less disorder

Question 6

Entropy increases from solid, liquid to gas. Why?

Accepted Answer

Molecular disorder increases

Answer

Molecules are more energetic

Answer

Molecular randomness decreases

Answer

Molecules are more reactive

Question 7

What phase of matter has the most entropy?

Accepted Answer

gas

Answer

liquid

Answer

ice

Answer

solid

Question 8

Entropy of a system increases when a reaction increases the number of particles.

Accepted Answer

true

Answer

false

Question 9

What is a spontaneous process ?

Accepted Answer

process that does not need external intervention to occur / keep happening

Answer

slow process

Answer

fast process

Answer

process that needs an external intervention to occur

Question 10

ΔH value in an endothermic reaction is a positive number.

Accepted Answer

true

Answer

false

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