RE-NEET Physics Thermodynamics Class 11 Questions

An ideal gas is made of polyatomic molecules. Each of the molecules has three translational, three rotational and f number of vibrational modes. If the ratio of heat capacities Cₚ/Cᵥ of the gas is 8/7, then the value of f is:

Consider that σₛ, k_B, b represent Stefan-Boltzmann constant, Boltzmann constant and Wien’s displacement law constant, respectively. The dimension of σₛk_B²b is :

One mole of an ideal monatomic gas undergoes a cyclic process as shown in the figure. The total heat supplied to the gas is:

In an adiabatic expansion, the temperature of one mole of an ideal monatomic gas (γ=5/3) decreases from 60K to 50K. The work done by the gas in the process is : (Take the universal gas constant as R=8.3 J mol⁻¹ K⁻¹)

The equilibrium state of a thermodynamic system is described by A. Pressure B. Total heat C. Temperature D. Volume E. Work done Choose the most appropriate answer from the options given below.

According to the law of equipartition of energy, the number of vibrational modes of a polyatomic gas of constant γ = Cₚ/Cᵥ is (Cₚ where Cᵥ are the specific heat capacities of the gas at constant pressure and constant volume, respectively):