The value of the product of molecular weight and the gas characteristic constant for all the gases in M.K.S. unit is
A. 29.27 kgfm/mol °K
B. 8314 kgfm/mol °K
C. 848 kgfm/mol °K
D. 427 kgfm/mol °K
Answer: Option C
This Question Belongs to Mechanical Engineering >> Engineering Thermodynamics
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Since, 1 kgf m = 9.81 Nm or 1Nm= (1/9.81)kgf m
And R= 8314 J/mol K or 8314 Nm/mol K
Therefore, R = (8314 /9.81) kgf m/mol k
Thus R= 848 kgf m/mol K
1 kgf m = 9.81 Nm
Therefore 1 Nm = 1/9.81 kgf m
Now, Value of R = 8314J/mol K or 8314 Nm/mol K
Hence, R = (8314 × 1/9.81)kgf m/mole K
Therefore R= 848 kgf m/mole K
B is correct option
Option C is right but unit is wrong.
It should be kgf-m/kmol-k
Option B is correct
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