Question

Steam at `100^@C` is passed into 1.1 kg of water contained in a calorimeter of water equivalent 0.02 kg at `15^@C`till the temperature of the calorimeter and its contents rises to `80^@C` . The mass of the steam condensed in kilogram is
A. `0.130`
B. `0.065`
C. `0.260`
D. `0.135`

Answer 1

Correct Answer - A
Heat released by steam = heat gained by water and calorimetry
`mL +m xx S (100 - 80) = (1.1 +0.02) xx S xx (80 - 15)`
`m xx 540 +20m = 1.12 xx 65, m = 0.130 kg`.