Ethyl chloride (C2H5Cl) boils at 12C. When liquid C2H5Cl under pressure is sprayed on a room-temperature (25C) surface in air, the surface is cooled...

Ethyl chloride (C2H5Cl) boils at 12∘C. When liquid C2H5Cl under pressure is sprayed on a room-temperature (25∘C) surface in air, the surface is cooled considerably.

Assume that the heat lost by the surface is gained by ethyl chloride. What enthalpies must you consider if you were to calculate the final temperature of the surface?