# The heat of vaporization of water is 540 cal/g. How many calories would be needed to convert 3 moles of water to vapor?

Jun 23, 2016

$Q = 3 \cdot m o l \times 18.01 \cdot g \cdot m o {l}^{-} 1 \times 540 \cdot c a l \cdot {g}^{-} 1$
$\cong$ $2500 \cdot c a l$
Both the water and the steam are considered to be at $100$ ""^@C.