A monatomic ideal gas is heated at constant pressure. How much fraction of heat is used to increase internal energy?

Options

A. `2/5`
B. `3/5`
C. `3/7`
D. `3/7`

Explanation

IF `Delta`T is the increase in temperature of a monatomic
Ideal gas increases in internal energy , `Delta E=3/2 R Delta T`
for 1 mol gas
Again molar specific that to increase temperature by `Delta T` at constant pressure =`C_pDeltaT=5/2 R Delta T`
Hence, required fraction
`=(i ncrease i n i nternal en ergy)/(given tha t)=(3/2R DeltaT)/(5/2R DeltaT)=3/5`