Question

Describe in detail what you expect for the changes in enthalpy, entropy, and free energy when a sample of liquid evaporates. How does temperature affect these changes?

Which of the following processes has an increase in entropy?
a) boiling a pot of water

b) freezing a sample of water

c) filtering sand out of a sample of water

d) synthesizing water from hydrogen and oxygen

Which of the following changes has a decrease in entropy?
a)N2O4 (g) yields 2NO2 (g)

b) C6H6 (l) yields C6H6 (g)

c) 2LiClO3 (s) yields 3O2 (g) + 2LiCl (s)

d) 3Fe (s) + 2O2 (g) yields

Answer 1

I have no idea what enthalpy and entropy are yet. Sorry.

Answer 2

Have you tried Khan's Academy?

Answer 3

:| no.

Answer 4

That MIGHT help.

Answer 5

Doesn't look like it haha

Answer 6

Describe in detail what you expect for the changes in enthalpy, entropy, and free energy when a sample of liquid evaporates. How does temperature affect these changes?
Evaporation is endothermic (DH>0) and is not affected by temperature
In evaporation you go from an oredered structure to a gas which means DS >0
Since DG = DH - TDs this means that DG will be negative only if TDS > DH which means at higher temperatures.