Question
Question: 2gm of steam condenses when passed through 40gm of water initially at 25°C. The condensation of stea...
2gm of steam condenses when passed through 40gm of water initially at 25°C. The condensation of steam raises the temperature of water to 54.3°C. What is the latent heat of steam
A
540 cal/g
B
536 cal/g
C
270 cal/g
D
480 cal/g
Answer
540 cal/g
Explanation
Solution
Let L be the latent heat and using principle of
calorimetry.
2L + 2 (100 – 54.3) = 40 × (54.3 – 25.3)
⇒ L = 540.3 cal/gm.