What is the change in enthalpy when 250 g of water vapor condenses at 100oc? (δhv = 40.67 kj/mol)

-564.4996 kJ is the change in enthalpy when 250 g of water vapor condenses at 100°C.

Explanation:

Moles of water =

Heat of condensation of 1 mol of water =

Heat change when 250 grams of water condenses at 100° C:

-564.4996 kJ is the change in enthalpy when 250 g of water vapor condenses at 100°C.

i do not get it   at all