Calculate the heat change in kilocalories for vaporization of 44 g of water at 100∘C.
Express your answer as a positive value using two significant figures and include the appropriate units.
(44 g) x (2260 J/g) x (1 kcal / 4184 J) = 24 kcal
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(44 g) x (2260 J/g) x (1 kcal / 4184 J) = 24 kcal