Question

4200 J of work is required for

• A. Increasing the temperature of 10 gm of water through 10°C
• B. Increasing the temperature of 100 gm of water through 10°C
• C. Increasing the temperature of 1 kg of water through 10°C
• D. Increasing the temperature of 10 kg of water through 10°C

Answer 1

Answer: (B)

Increasing the temperature of 100 gm of water through 10°C

Answer 2

Work done to raise the temperature of 100 gm water through 10°C is

$W = JQ = 4.2 \times (100 \times 10^{- 3} \times 1000 \times 10) = 4200J$