Question

Steam at 100⁰C is passed into 1.1 kg of water contained in a calorimeter of water equivalent 0.02 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: (A)

0.130

Answer 2

Heat taken = Heat given

Let mass be m

∴ m × 540 + m(100 − 80) = (1.1 + 0.02)(80 − 15)

540 m + 20 m = 1.12 × 65 ⇒ 560m = 1.12 × 65

⇒ m = $\frac{1.12 \times 65}{560}$ = 0.130

Here A is correct.