JEE 2020 Physics: Thermodynamics Quiz (08.07.2019)

Fig. shows graphs of pressure vs. density for an ideal gas at two temperature T₁ and T₂.

When an enclosed perfect gas is subjected to an adiabatic process :

Find the approx. number of molecules contained in a vessel of volume 7 litres at 0°C at 1.3 × 10⁵ pascal

A fixed mass of ideal gas undergoes changes of pressure and volume starting at L, as shown in figure.

Which of the following is correct :

One mole of a gas expands obeying the relation as shown in the P-V diagram. The maximum temperature in this process is equal to

A vessel with open mouth contains air at 60°C. When the vessel is heated up to temperature T, one fourth of the air goes out. The value of T is

If heat is supplied to an ideal gas in an isothermal process -

A gas is contained in a metallic cylinder fitted with a piston. The piston is suddenly moved in to compress the gas and is maintained at this position.

As time passes the pressure of the gas in the cylinder

Refer to fig. Let ΔU₁ and ΔU₂ be change in internal energy in process A and B respectively, ΔQ be the net heat given to the system in process A + B and ΔW be the net work done by the system in the process A + B

A certain amount of gas is taken through a cyclic process (ABCDA) that has two isobars, one isochore and one isothermal. The cycle can be represented on a P-V indicator diagram as :