A vessel containing 5 litres of a gas at 0.8 m pressure is connected to an evacuated vessel of volume 3 litres. The resultant pressure inside will be (assuming whole system to be isolated) 

(1) 4/3 m

(2) 0.5 m

(3) 2.0 m

(4) 3/4 m

If a gas is heated at constant pressure, its isothermal compressibility 

(1) Remains constant

(2) Increases linearly with temperature

(3) Decreases linearly with temperature

(4) Decreases inversely with temperature

In isothermal expansion, the pressure is determined by:

The isothermal bulk modulus of a perfect gas at normal pressure is -

(1) $1.013\times {10}^{5}N/m^2$

(2) $1.013\times {10}^{6}N/m^2$

(3) $1.013\times {10}^{-11}N/m^2$

(4) $1.013\times {10}^{11}N/m^2$

In an isothermal change, an ideal gas obeys:

The specific heat of a gas in an isothermal process is: 

The latent heat of vaporisation of water is 2240 J/gm. If the work done in the process of expansion of 1 g is 168 J, then increase in internal energy is 

(1) 2408 J

(2) 2240 J

(3) 2072 J

(4) 1904 J

A cylinder fitted with a piston contains 0.2 moles of air at temperature 27°C. The piston is pushed so slowly that the air within the cylinder remains in thermal equilibrium with the surroundings. Find the approximate work done by the system if the final volume is twice the initial volume 

(1) 543 J

(2) 345 J

(3) 453 J

(4) 600 J