Basic Mechanical Engineering (3110006)

BE | Semester-1   Winter-2019 | 03-01-2020

Q3) (b)

Differentiate between gas constant and Universal gas constant.

Characteristic gas constant ( R ) varies gas to gas but universal gas constant ( R0 ) is fixed and its value is 8.314 kJ/kg mol K.

Value of gas constant ( R ) can be determine for any gas by using relation,

R=R0M 

where, M = molecular weight of gas and R0 = universal gas constant.

The value of R for air 0.287 kJ/kg K