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Question

 Molar specific heat of oxygen at constant pressure Cp=7.2cal/mol/C and R=8.3J/mol/K. At constant volume, 5 mol of oxygen is heated from 10C to 20C, the quantity of heat required is approximately
 


A
25 cal
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B
50cal
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C
250cal
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D
500cal
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Solution

The correct option is C 250cal
 By Mayer’s formulaCν=CpR=7.225 cal/molC
At constant volume ΔQ=μcνΔT=5×5×10=250cal
 

Physics

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