Chapter 18, Problem 18.30QP

Describe how you would expect the spontaneity (ΔG°) for each of the following reactions to behave with a change of temperature.

1. a Phosgene, COCl₂, the starting material for the preparation of polyurethane plastics, decomposes as follows:

   ${\text{COCl}}_2(g)\stackrel{}{\to }\text{CO}(g)+{\text{Cl}}_{\text{2}}(\text{g})$

2. b Chlorine is added to ethylene to produce dichloroethane, a solvent:

   ${\text{Cl}}_{\text{2}}(\text{g}){\text{+C}}_{\text{2}}{\text{H}}_{\text{4}}(\text{g})\stackrel{}{\to }{\text{C}}_{\text{2}}{\text{H}}_{\text{4}}{\text{Cl}}_{\text{2}}(l)$