# The adiabatic index for the monoatomic gas is equal to:

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

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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 CP to heat capacity at constant volume CV.

​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.

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