Thermal Physics Mock Tests

At what temperature will the rms speed of oxygen molecules (M = 32 g/mol) equal the rms speed of hydrogen molecules (M = 2 g/mol) at 27 C

The RMS speed of molecules of a gas at temperature T and pressure P is v_rms. If the pressure is doubled isothermally, the new RMS speed is:

Two identical metallic spheres A and B are made of the same material. Sphere A is hollow and sphere B is solid. Both are heated to the same temperature and then allowed to cool under identical conditions. The ratio of their initial rates of cooling is:

A copper block of mass 2 kg at 100 C is placed on a large ice block at 0 C. If the specific heat of copper is 0.4 kJ/kg.K and the latent heat of fusion of ice is 334 kJ/kg, the mass of ice melted is approximately

Two identical metallic rods are used to connect two reservoirs and carry heat Q in time t. If the rods are connected in series instead of parallel, the time taken to carry the same heat Q is:

An ideal gas undergoes an adiabatic compression from volume V to V/2. If the adiabatic index gamma = 1.4, the ratio of final to initial pressure is

A mixture contains 2 moles of helium (monoatomic) and 3 moles of hydrogen (diatomic) at temperature T. The total internal energy of the mixture is (take R = gas constant):

A mixture contains 1 mole of an ideal monoatomic gas and 1 mole of an ideal diatomic gas. The molar heat capacity of the mixture at constant volume (Cv) is: