Question

Steam at 100⁰C is passed into 1.1 kg of water contained in a calorimeter of water equivalent0.02 kg at 15⁰C till the temperature of the calorimeter and its contents rises to 80⁰C. The mass of the steam condensed in kg is –

• A. 0.130
• B. 0.065
• C. 0.260
• D. 0.135

Answer 1

Answer: (D)

0.135

Answer 2

Heat required

Q = (1.1 + 0.02)×10³×1×(80–15)=72800 cal

Therefore mass of steam condensed

m = $\frac{Q}{L}$ = 0.135 kg