1g of a liquid is converted to vapour at 3 x 10 5 Pa pressure. If 10% of the heat supplied is used for increasing the volume by 1600 cm 3 during this phase change, then the increase in internal energy in the process will be:
Text Solution
Verified by ExpertsThe correct answer is:
A
Work done = P 
Y
= 3x10 5 xl600x10 -6
= 480J
Only 10% of heat is used in work done.
Hence 
Q = 4800 J
The rest goes in internal energy, which is 90% of heat.
Change in internal energy = 0.9 x 4800 = 4320 J
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