Heat of Vaporization

Heat of vaporization, abbreviated as \(H_v\), is the amount of heat needed to be consumed to vaporize a specific amount of liquid at a constant temperature.

 

Heat of vaporization Formula
\(\large{ H_v  =  \frac{ q }{ m }  }\)
Symbol	English	Metric
\(\large{ H_v }\) = heat of vaporization	\(\large{\frac{Btu}{lbm}}\)	\(\large{\frac{J}{kg}}\)
\(\large{ q }\) = heat	\(\large{\frac{Btu}{lbm}}\)	\(\large{\frac{J}{kg}}\)
\(\large{ m }\) = mass of substance	\(lbm\)	\(kg\)