Asubstance, x, has the following properties. (size of mass is 250. g.) specific heat capacities δhvap 20. kj/mol c(s) 3.0 j/g·°c δhfus 5.0 kj/mol c(l) 2.5 j/g·°c bp 75°c c(g) 1.0 j/g·°c mp −15°c calculate the energy that must be removed to convert substance x from a gas at 107°c to a solid -54.3°c. assume x has a molar mass of 75.0 g/mol.