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If 2 kg of steam at 100^(@)C condenses i...

If 2 kg of steam at `100^(@)C` condenses into water at `40^(@)C`, then the enegy evolved in calories will be `(L=540cal//gm,C=1cal//gm.^(@)C)`

A

600 k cal

B

40 k cal

C

1200 k cal

D

120 k cal

Text Solution

Verified by Experts

The correct Answer is:
C
`dQ=mL=mCdQ`
`=540xx2+2xx1xx60=1080+120`
`=1200kcal`
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