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Question

2gm of steam condenses when passed through 40gm of water initially at 25oC. The condensation of steam raises the temperature of water to 54.3oC what is the latent heat of steam?

A
540cal/g
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B
536 cal/g
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C
270 cal/g
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D
480cal/g
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Solution

The correct option is A 540cal/g
x=20cm
Calorimetry
2×L+2×1×(10054.3)=40×(54.325).
2L=1080.6
L=540.3
L540cal/g

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