Ten moles of a solid is placed in a piston-cylinder device, and its pressure is maintained constant at P = 0.7 atm throughout the following process.

∎ The solid is heated to 47°C, at which temperature it melts.

∎ It takes 55,000 J of heat to melt the solid completely.

∎ The liquid is heated to 75°C, at which temperature it boils.

∎ It takes 429,000 J of heat to boil the liquid completely.

∎ The volume is 0.57 L when melting begins, 0.63 L when melting ends, and 0.64 L when boiling begins.

Give your best estimate of each of the following properties of this compound.

A. The coefficient of thermal expansion in the liquid phase

B. The normal boiling point

C. The normal melting point

D. The triple point