Chemistry Practice Problems Entropy Practice Problems Solution: Which involves the greatest increase in entropy?a....

# Solution: Which involves the greatest increase in entropy?a. H2O(l, 100°C) → H2O(s, 0°C)b. H2O(g, 100°C) → H2O(s, 0°C)c. H2O(g, 100°C) → H2O(l, 100°C)d. H2O(l, 100°C) → H2O(g, 100°C)e. H2O(g, 100°C) → H2O(g, 0°C)

###### Problem

Which involves the greatest increase in entropy?

a. H2O(l, 100°C) → H2O(s, 0°C)

b. H2O(g, 100°C) → H2O(s, 0°C)

c. H2O(g, 100°C) → H2O(l, 100°C)

d. H2O(l, 100°C) → H2O(g, 100°C)

e. H2O(g, 100°C) → H2O(g, 0°C)

###### Solution

We’re being asked to predict which has the greatest entropy (ΔS) for the given reactions. Recall that if:

• ΔS > 0 or ΔS = (+); entropy is increased

• ΔS < 0 or ΔS = (–); entropy is decreased

Remember that phase changes lead to a change in entropy:

View Complete Written Solution

Entropy

Entropy

#### Q. Which of the following result(s) in an increase in the entropy of the system?I. condensation of a gas to a liquidII. decreasing the volume of 1.0 mol ...

Solved • Wed Dec 18 2019 15:07:40 GMT-0500 (EST)

Entropy

#### Q. Which of the following reactions will have a negative value of ΔS?(i) Ba2+(aq) + SO42-(aq) → BaSO4(s)(ii) 2 Na(s) + 2 H2O(l) → 2 NaOH(aq) + H2(g)(iii)...

Solved • Tue Dec 17 2019 11:25:14 GMT-0500 (EST)

Entropy

#### Q. Which of the following reactions will have a negative value of ∆S?(i) Ba2+(aq) + SO42-(aq) → BaSO4(s)(ii) 2 Na(s) + 2H2O(l) → 2 NaOH(aq) + H2(g)(iii) ...

Solved • Mon Dec 16 2019 09:00:34 GMT-0500 (EST)

Entropy

#### Q. When does entropy increase and when does it decrease?

Solved • Wed Aug 07 2019 20:57:14 GMT-0400 (EDT)