QUESTION 3 What is the enthalpy change for the first reaction?
P4(s) + 6Cl2(g) - 4PC13(0) AH -
P4(s) + 10C12(g) - 4PC15(s) AH = -1.771.6
PC13(1) + Cl2 - PCs(s) AH - -128.1

The density of the solid phase of a substance is 0.90 g/cm3 and the density of the liquid phase is 1.0 g/cm3. a large increase in pressure will a. lower the freezing point b. raise the freezing point c. lower the boiling point d. raise the triple point e. lower the triple point