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Problem: The heat of vaporization of water at 373 K is 40.7 kJ/mol. Find ΔE for the evaporation of 451 g of water at this temperature.

FREE Expert Solution

We are asked to find ΔE for the evaporation of 451 g of water at this temperature.


ΔE = q + w


Molar mass H2O = 18.02 g/mol

Calculate ΔH:

 q =nHvapq =mMHvapq =(451 g18.02 g/mol)(40.7 kJ/mol)

q= 1018.63 kJ 



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Problem Details

The heat of vaporization of water at 373 K is 40.7 kJ/mol. Find ΔE for the evaporation of 451 g of water at this temperature.

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