4.2 At 1 atm pressure, ice melts at 273.15 K. In addition, !:,J/ fus = 6.009 kJ/mol, density of ice = 0.92 g/cm3, and density of liquid water = 1.00 g/cm 3 • (a) What is the melting point of ice under 50 atm pressure? . (b) The blade of an ice skate is ground to a knife edge on each side of the Problems 117 ~kate. ! ~e :~d= ~f the knife edge is 0.001 in., and the length of the skate m con c WI e Ice is 3 in., calculate the pressure exerted on the ice by a 150 lb man. (Assume that the skater u . d ) . . ses one e ge. (c) What IS the melting point of ice under this pressure?