SSC JE Mechanical Engineering 2012 Paper

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Question : 191 of 200

Marks: +1, -0

Which of the following gases has the highest value of characteristic gas constant (R)?

Carbon Dioxide
Sulphur Dioxide
Oxygen
Nitrogen

Solution:

Characteristic gas constant

(R)={ \Universal \gas \Constant (R↖{-})}/{\Molecular \weight (\M) }

R_{\CO_2}= 8314/44=188.95

kJ/kg K

R_{\SO_2}= 8314/64=129.90

kJ/kg K

R_{\O_2}= 8314/32=259.81

kJ/kg K

R_{\N_2}= 8314/28=296.92

kJ/kg K

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