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Some steam at 100^(@)C is passed into 1....

Some steam at `100^(@)C` is passed into `1.1` kg of water constained in a calorimeter of water equivalent 20 gm at `15^(@)C` so that the temperature of the calorimeter and its contained rises to `80^(@)C` What is the mass of steam condensing (in kg).

A

`0.130`

B

`0.065`

C

`0.260`

D

`0.135`

Text Solution

Verified by Experts

The correct Answer is:
A
Heat required,
`Q=(1.1+0.02)xx10^(3)xx1xx(80-15)=72800cal`
Let `m` gram of steam is condensed, then heat loss
`=mxx540+mxx1xx20`
`=560m`
Heat loss=Heat gain
`implies 560m=72800`
`implies m=130g=0.130Kg`.
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