PROBLEM 76P

The evaporation of water is endothermic:

What minimum mass of water (in g) has to evaporate to absorb 175 kJ of heat?

Solution 76P

absorb 44.01 kJ of heat per mole of evaporation here. So take 175 kJ

4.54 mole of water evaporated. Convert this to grams by multiplying by 18 g/mol.