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  • Amount of heat (in cal) required to convert 2gm of water which is at 80o C to 2 gm of vapour at 100o C is Option: 1 1012

Amount of heat (in cal) required to convert 2gm of water which is at 80o C to 2 gm of vapour at 100o C is 

Option: 1 1012

Option: 2 912

Option: 3 1112

Option: 4 1212

Answers (1)

best_answer

As we have learned 

Latent Heat of Vaporisation -

Liquid\xrightarrow[]{Heat Supplied}vapour

- wherein

Latent heat of vaporisation is 536 cal/gm.

 Q = m s \Delta T + m L

2 \times 1 \times 20 cal + 2 \times 536 cal = 1112 cal

 

Posted by

Nehul

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