Respuesta :

madmadison123
moles H2O = 1233 g/ 18 g/mol=68.5 68.5 x 40.7 =2788 kJ
kristoffer
To solve this you need the value for ΔHvap for water, which is a constant that tells you how much energy is used/released when water changes it's physical state from vapour to liquid, or liquid to vapor. 

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