Question

If the specific heat of helium at constant volume is 12.6 J/mol K, then the specific heat of hydrogen at constant volume in J/mol K will be
A. 12.6
B. 16.8
C. 18.9
D. 21

Answer 1

Correct Answer - D
Helium is monatomic gas
`thereforeC_(V)=(3)/(2)R `
Hydrogen is diatomic gas
`C_(V)=(5)/(2)R`
`therefore (C_(vd))/(C_(vm))=(5)/(2)`