Question

$75g$ of water at ${10}^{o}C$ is heated by supplying $25200J$ of heat energy. If the specific heat capacity of water is $4.2J/g^{o}C$. Calculate the final temperature of water

• A. $0^{o}C$
• B. ${10}^{o}C$
• C. ${100}^{o}C$
• D. ${90}^{o}C$

Answer 1

The correct option is D ${90}^{o}C$

Heat supplied to water will increase its temperature

$Q=mc\Delta T$

let the final temperature be $T$

$25200=75\times 4.2\times (T-10)$

$T={90}^{o}C$