The difference between the two specific heats of a gas $C_{p} - C_{v} = 2$ cal. If $R = 8.314 J K^{- 1} m o l^{- 1}$ , the value of mechanical equivalent of heat is :

4.157 J/cal

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42 J/cal

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420 J/cal

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4200 J/cal

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Solution

The correct option is A 4.157 J/cal
The value of R in SI units is, 8.314 J/mol-K
The mechanical equivalent of heat is $\frac{R}{C_{p} - C_{v}}$ = 4.157 J/cal

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The difference between the two specific heats of a gas Cp−Cv=2 cal. If R=8.314 JK−1mol−1, the value of mechanical equivalent of heat is :

The correct option is A 4.157 J/calThe value of R in SI units is, 8.314 J/mol-KThe mechanical equivalent of heat is RCp−Cv = 4.157 J/cal

The difference between the two specific heats of a gas $C_{p} - C_{v} = 2$ cal. If $R = 8.314 J K^{- 1} m o l^{- 1}$ , the value of mechanical equivalent of heat is :

The correct option is A 4.157 J/cal
The value of R in SI units is, 8.314 J/mol-K
The mechanical equivalent of heat is $\frac{R}{C_{p} - C_{v}}$ = 4.157 J/cal