Verified Solution • 2025–26 Session
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QJEEM23Phf81b: JEE Main 2023 Physics - Class 11 JEEM23Phf81b Solution: 1 g of a liquid is converted to vapour at 3 10 Pa pressure. If…
1 g of a liquid is converted to vapour at 3 10 Pa pressure. If 10% of the heat supplied is used for increasing the volume by 1600 cm during this phase change, then the increase in internal energy in the process will be :
Multiple Choice Options
- A 4800 J
- B 4320 J
- C 432000 J
- D 4.32 10 J
Step-by-Step Verified Solution
Work done = P V
= 3 × 105 × 1600 × 10–6
= 480 J
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 × 4800 = 4320 J
= 3 × 105 × 1600 × 10–6
= 480 J
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 × 4800 = 4320 J