# The latent heat of vaporization of water is 2260 J/g. How much energy is released when 100 grams of water condenses from vapor at 100°C?

The answer is: $Q = 226 k J$.
$Q = {L}_{v} m$
$Q = 2260 \frac{J}{g} \cdot 100 g = 226000 J = 226 k J$.