Question

What will be the amount of heat required to convert $50g$ of ice at $0^{\circ }C$ to water at $0^{\circ }C$?

• A. $400cal$
• B. $4000cal$
• C. $3000cal$
• D. $300cal$

Answer 1

The correct option is B $4000cal$

Amount of heat required to convert unit mass of ice into water is called latent heat ($L$) of fusion of ice i.e.

$Q=mL$ ,

given , $m=50g$ ,

we have , $L=80cal/g$

Hence , $Q=50\times 80=4000cal$