Question

The specific latent heat of vaporization of water is ________.

Answer 1

Step 1: Specific latent heat of vaporization

1. It is defined as the amount of heat energy absorbed at constant temperature by the unit mass of a liquid to convert into the gaseous phase.
2. Its unit is $J/g$ and $KJ/Kg$.

Step 2: Formula used

$\mathrm{Q}=\mathrm{mL}$

Here,

$Q$ = energy transferred (J)

$m$ = mass (Kg)

$L$ = specific latent heat (J/kg)

Hence the specific latent heat of vaporization of water is $540\mathrm{Cal}/\mathrm{g}\mathrm{or}2260\mathrm{J}/\mathrm{g}$.