Question

why does ice melt faster under pressure​

Answer 1

Answer:

It takes the same amount of heat energy to melt a gram of ice, 80 calories per gram, whether the ice is under pressure or not. ... The unpressurized block of ice sits at 0 degrees Celsius while it melts, and the pressurized one will have a lower temperature, so it receives the heat energy faster and melts faster.

Answer 2

Answer:

Unlike other unusual materials whose bonds contract under compression, the O:H nonbond undergoes contraction and the H-O bond elongation towards O:H and H-O length symmetry in water and ice. The energy drop of the H-O bond dictates the melting point Tm depression of ice.