Physics Thermodynamics

If the molar specific heat at constant pressure for a polyatomic non-linear gas is x and the molar specific heat at constant volume for a diatomic gas is y, find the value of x y

An ideal gas undergoes a cyclic process whose indicator diagram is as shown in the figure. Find the work done by the gas in 1 complete cycle.

The speed of sound in a particular gas at a temperature 27°C is 340 m/s. Then, the speed of sound in the same gas at a temperature 90°C is:

n mole of perfect gas undergoes a cyclic process ABCA (see figure) consisting of the following processes.

A->B  : Isothermal expansion at temperature T so that the volume is doubled from V₁ to V₂ and Pressure changes from P₁ to P₂.

B->C  : Isobaric compression at pressure P₂ to initial volume V₁.

C->A  : Isobaric change leading to change of pressure from P₂ to P₁.

Total work done in the complete cycle ABCA is:

A steam engine intakes 50g of steam at $100°C$ $$ per minute and cools it down to $20°C.$ $$ If latent heat of vaporization of steam is 540 cal g1, then the heat rejected by the steam engine per minute is………….* 103 cal.

(Given : specific heat capacity of water : 1 cal g1 0C1)

If the molar specific heat at constant pressure for a polyatomic non-linear gas is x and the molar specific heat at constant volume for a diatomic gas is y, find the value of x y.

An ideal gas undergoes a thermodynamic process in which internal energy (U) of the gas depends on pressure (P) of the gas as U = aP⁴, where a is a positive constant. Assuming gas to be monoatomic, the molar heat capacity of the gas for given process will be

A cup of coffee cools from 90°C to 80°C in t minutes, when the room temperature is 20°C.
The time taken by a similar cup of coffee to cool from 80°C to 60°C at a room temperature same at 20°C is:

A Carnot engine has an efficiency of $50\mathrm{\%}$ when its source is at a temperature ${327}^{?}\mathrm{C}$ . The temperature of the sink is:

An ideal gas undergoes four different processes from the same initial state as shown in the figure below: Those process are adiabatic, isothermal, isobaric and isochoric. The cure which represents the adiabatic process among 1, 2, 3 and 4 is: