Question

The quantity of heat required to raise the temperature of $2000g$ of water from ${10}^{\circ }C$ to ${50}^{\circ }C$ is equal to :

• A. $80cal$
• B. $80,000cal$
• C. $8000cal$
• D. $800cal$

Answer 1

Answer: (B)

$80,000cal$

The correct answer is option(B).

Given:

mass, $m=2000g$, Specific heat, $C=1cal{g}^{-1}°C^{-1}$, $\Delta T=50-10=40°C$

We know,

$Q=mC\Delta T=2000\times 1\times 40=80,000cal$

Hence, the required quantity of heat is 80,000cal