Classify the following phase changes by the signs of the system's delta H and delta S.

Solutions

Expert Solution

Liquid to gas:

Heat is added, \(\Delta H=+\mathrm{ve}\)

Randomness increases due to a lack of intermolecular forces between

the molecules, \(\Delta S=+\) ve

Gas to Liquid:

Heat is removed, \(\Delta H=-\) ve

Randomness decreases due to an increase in intermolecular forces between

the molecules, \(\Delta S=-\) ve

Solid to gas:

Heat is added, \(\Delta H=+\mathrm{ve}\)

Randomness increases due to a lack of intermolecular forces between

the molecules, \(\Delta S=+\mathrm{ve}\)

Gas to solid:

Heat is removed, \(\Delta H=-\mathrm{ve}\)

Randomness decreases due to an increase in intermolecular forces between

the molecules, \(\Delta S=-\mathrm{ve}\)

Solid to liquid:

Heat is added, \(\Delta H=+\mathrm{ve}\)

Randomness increases due to a lack of intermolecular forces between

the molecules, \(\Delta S=+\mathrm{ve}\)

Liquid to solid:

Heat is removed, \(\Delta H=-\) ve

Randomness s decreases due to an increase in intermolecular forces between

the molecules, \(\Delta S=-\) ve

Dr. OWL answered 3 years ago

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