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Question: Answered & Verified by Expert
200 g water is heated from 40 oC to 60 oC . Ignoring the slight expansion of water, the change in its internal energy is close to (Given specific heat of water =4184 J kg-1 K-1):
PhysicsThermodynamicsJEE MainJEE Main 2016 (09 Apr Online)
Options:
  • A 167.4 kJ
  • B 8.4 kJ
  • C 4.2 kJ
  • D 16.7 kJ
Solution:
2219 Upvotes Verified Answer
The correct answer is: 16.7 kJ
Assuming isochoric process

Q=U

U=0.2×4184×20

=16.7 kJ

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