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40. The value of the gas constant (R) calculated from the perfect gas equation is 8.32 joules/gm mole K, whereas its value calculated from the knowledge of

CP  and Cv  of the gas is 1.98 cal/gm mole K. From this data, the value of J is

(a)  4.16 J/cal                      (b) 4.18 J/cal

(c)  4.20 J/cal                       (d) 4.22 J/cal

Answer-c

(7)

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