The Enthalpy of Vaporization of Ammonia at Its Normal Boiling $\circ$

The enthalpy of vaporization of ammonia at its normal boiling point,-33.34 ^$\circ$ C,is approximately 23.35 kJ/mol.What is the entropy change in the surroundings when one mole of liquid ammonia vaporizes at -33.34 ^$\circ$ C in a large room maintained at a temperature of 25.0 ^$\circ$ C?

A) -2.40 $\times$ 10² J/K
B) -78.3 J/K
C) -19.1 J/K
D) +78.3 J/K
E) +2.40 $\times$ 10² J/K