Question

Isopropyl alcohol, C3H8O, is used in rubbing alcohol mixture. Alcohol on the skin cools by evaporation. How much heat(in kJ) is absorbred by the alcohol of 2.25g EVAPORATED? THE HEAT VAPORIZATION OF Isopropyl alcohol is 42.1 kJ/MOL

Compute the number of moles of C3H8O that correspond to 2.25 g. Then multiply that number of moles by 42.1 kJ/mol. That will be the answer, in kJ.