Question

The maximum value of adiabatic vatio for monoatomic gas is – .. ​

Answer 1

The maximum value of the adiabatic ratio for monoatomic gas is 1.67

• The adiabatic index of an ideal monoatomic gas (e.g., helium, argon, etc.) is 1.67.
• For monoatomic gases, Cv = $\frac{3R}{2}$ and Cp = $\frac{5R}{2}$ , where R denotes the universal gas constant.
• The adiabatic ratio is the ratio of Cp and Cv.
• An adiabatic process is one in which the system does neither absorb nor lose heat.
• With Q = 0, the first rule of thermodynamics states that all change in internal energy is in the form of work done.
• The temperature of an ideal monoatomic gas always drops due to adiabatic expansion.