Help with organic chem plz, calculate G?

The reaction of chloroethane with water in the gas phase to produce ethanol and hydrogen chloride hase a H = +o.oo9702 horsepower-hour lb^-1 and a S = +0.0001793 horsepower-hour lb^-1 R^-1 @-405.56F. Which of these terms, if either, favors the reaction going to completion? Please calculate G for the reaction.