Given the data in Exercise 87 on substance X, calculate the energy that must be removed to convert 250 . g of substance \(\mathrm{X}\) from a gas at \(100 .{ }^{\circ} \mathrm{C}\) to a solid at \(-50 .{ }^{\circ} \mathrm{C}\). Assume \(\mathrm{X}\) has a molar mass of \(75.0 \mathrm{~g} / \mathrm{mol}\).

Data from Exercises 87

A substance has the following properties:

Sketch a heating curve for the substance, starting at \(-50^{\circ} \mathrm{C}\).

AHvap AHfus bp mp 20 kJ/mol 5.0 kJ/mol 75C -15C C(s) Specific Heat Capacities C(1) C(g) -1 3.0 J g C 1 2.5 Jg- C-1 1.0 J g C 1