Question

1) Water is one of the only substances that has a lower density as a solid than as a liquid. When liquid and solid water are in equilibrium at 0 , if the external pressure is raised, which component of the mixture will have the value of G go up by a greater amount: (You can choose more than one)

I) The solid

II) The liquid

III) equal amounts to both

2) While we have not yet studied equilibrium, what do you think this rise in pressure will do to the equilibrium? (You can choose more than one)

I) Shift the equilibrium to the liquid

II) Shift the equilibrium to the solid

III) Leave the equilibrium unchanged

Please explain.

Answer 1

1]

Ice ----- Water

Ice = low density ==> more volume

Water = high density = less volume

 if we increase pressure, equil. willl be shifted in the direc. of less volume, hence with rise of press. more ice will melt into water.

More amount of water will be there

Therefore G value of solid go up by greater extent

2] Shift the equilibrium to solid .

Increasing pressures leads to decrease in Volume

so before knowing equilibrium , the liquid condenses to ice at high pressure