Engineering


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  • Ex: The latent heat of vaporisation of water is 2240 J/gm. If the work done in the process of expansion of 1 g is 168 J, then increase  in internal energy is
    A) 2408 J                                      
    B) 2240 J
    C) 2072 J                                      
    D) 1904 J
    Explanation: ΔQ = ΔU + ΔW ⇒ ΔU = ΔQ − ΔW = 2240 − 168 = 2072 J.
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