Chapter 9, Problem 9.121SP

The commercial production of 1,2-dichloro ethane, a solvent used in dry cleaning, involves the reaction of ethylene with chlorine:

${\text{C}}_{\text{2}}{\text{H}}_{\text{4}}\text{(g)}+C{l}_2(g)\to {\text{C}}_{\text{2}}{\text{H}}_{\text{4}}{\text{C1}}_{\text{2}}\text{(l)}$

Is $\Delta S$ for this reaction likely to be positive or negative? Explain.