Question

The adiabatic index for the monoatomic gas is equal to:
1. 5/3
2. 7/5
3. 4/3
4. 6/5

Answer 1

Correct Answer - Option 1 : 5/3

CONCEPT:

Adiabatic index:

• The adiabatic index is also known as the heat capacity ratio and is defined as the ratio of heat capacity at constant pressure C_P to heat capacity at constant volume C_V.

​It is given as,

\(\Rightarrow γ=\frac{C_P}{C_V}\)

Gas	Monoatomic	Diatomic	Polyatomic
γ	5/3	7/5	4/3

EXPLANATION:

Gas	Monoatomic	Diatomic	Polyatomic
γ	5/3	7/5	4/3

 

• From the above table, it is clear that the adiabatic index for the monoatomic gas is equal to 5/3. Hence, option 1 is correct.