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Question

Consider the following statements.
1. Steam at 100C and boiling water at 100C contain same amount of heat.
2. Latent heat of fusion of ice is equal to the latent heat of vaporisation of water.
3. Conditioner heat is extracted from the room air at the evaporator coils and is rejected out at the condenser coils.
Which of these statements is/ are correct?

A
1 and 2
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B
2 and 3
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C
Only 2
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D
Only 3
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Solution

The correct option is C Only 3
Steam at 100oC has more amount heat than boiling water at the same temperature.
Latent heat of fusion of ice is less than latent heat of vaporisation of water.
Thus statements 1 and 2 are incorrect but statement 3 is correct.

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