COMEDK · Physics · 13. Thermodynamics
The latent heat of vaporisation of water is \(2240 \mathrm{~J}\). If the work done in the process of vaporisation of \(1 \mathrm{~g}\) is \(168 \mathrm{~J}\), the increase in internal energy is
- A 2408 J
- B 1408 J
- C 2072 J
- D 2208 J
Answer & Solution
Correct Answer
(C) 2072 J
Step-by-step Solution
Detailed explanation
According to the first law of thermodynamics, the heat supplied \(Q\) is equal to the sum of the change in internal energy \(\Delta U\) and the work done \(W\) by the system during the process of vaporisation. \(Q = \Delta U + W\) Given that the latent heat of vaporisation…
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