Question:medium
Density of water at 4\(^\circ\)C is 1000 kg/m\(^3\) and at 20\(^\circ\)C it is 998 kg/m\(^3\). If 4kg of water is heated from 4\(^\circ\)C to 20\(^\circ\)C, the change in internal energy of water is : (Given : specific heat capacity of water = 4200 J/kg K, Atmospheric pressure P = \(10^5\) Pa).
Density of water at 4\(^\circ\)C is 1000 kg/m\(^3\) and at 20\(^\circ\)C it is 998 kg/m\(^3\). If 4kg of water is heated from 4\(^\circ\)C to 20\(^\circ\)C, the change in internal energy of water is : (Given : specific heat capacity of water = 4200 J/kg K, Atmospheric pressure P = \(10^5\) Pa).
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For processes involving liquids and solids, the work done due to volume change is often very small compared to the heat supplied, but it's not always negligible, especially when high precision is required as in this question's options. Always calculate both Q and W unless you are sure W can be ignored.
Updated On: Feb 6, 2026
- 268799.2 J
- 268800.8 J
- 268800.0 J
- 267765.2 J
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The Correct Option is A
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