The heat vaporization of water is 40.66 kj/mol ...? The heat vaporization of water is 40.66 kj/mol. How much heat is absorbed when 3.45g of water boils at atmospheric pressure?

Question

Chemistry

Josh Koch

9 May, 16:51

The heat vaporization of water is 40.66 kj/mol ...? The heat vaporization of water is 40.66 kj/mol. How much heat is absorbed when 3.45g of water boils at atmospheric pressure?

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Humphrey · Answer 1

To answer the question above, first convert the given amount of water from grams to mol by dividing it with its molar mass which is 18 g/mol.

amount in mol = 3.45 g x (mol / 18 g) = 23/120 mol

Then, multiply this amount in mol with the heat of vaporization given.

(23/120) mol x (40.66 kj/mol) = 7.793 kJ

Thus, the heat absorbed is approximately equal to 7.793 kJ.