Question

How many calories are needed to heat $100g$ of water from $278K$ to $288K$?

• A. $10$ calories
• B. $60$ calories
• C. $100$ calories
• D. $1000$ calories

Answer 1

The correct option is D $1000$ calories

$Q=nC△T$

$n=100g$

$C=$ specific heat capacity of water=$1J{g}^{-1}{{}^{o}C}^{-1}$

$△T=(288K-278K)$

$△T=10$

$Q=100\times 1\times 10$

$Q=1000$ calories.