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45. 5 moles of oxygen is heated at constant volume from 10°C to 20°C. The change in the internal energy of the gas is (the gram molecular specific heat of oxygen at constant pressure,  Cp=8 cal/mole °C and R = 8.3 cal/mole °C)        

(a) 200 cal                                       (b)  300 cal

(c)   100 cal                                     (d)  None of these

Answer-b

(20)

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