Thermodynamics ...

If we consider solar system consisting of the earth and sun only as one of the ideal thermodynamic system. The sun works as source of energy having temperature 6000 K and the earth as sink having temperature 300 K, the efficiency of solar system would be on the basis of exchange of radiations

The temperature of sink of Carnot engine is 27° C. Efficiency of engine is 25%. Then temperature of source is

A carnot engine has the same efficiency between 800 K to 500 K and x K to 600 K. The value of x is

Which of the following processes is reversible?

Efficiency of a Carnot engine is 50% when temperature of outlet is 500 K. In order to increase efficiency up to 60% keeping temperature of intake the same what is temperature of outlet?

An ideal refrigerator has a freezer at a temperature of –13°C. The coefficient of performance of the engine is 5. The temperature of the air (to which heat is rejected) will be

A mono atomic gas is supplied the heat Q very slowly keeping the pressure constant. The work done by the gas will be

The volume of air increases by 5% in its adiabatic expansion. The percentage decrease in its pressure will be

When an ideal monoatomic gas is heated at constant pressure, fraction of heat energy supplied which increases the internal energy of gas, is

Initial pressure and volume of a gas are P and V respectively. First it is expanded isothermally to volume 4V and then compressed adiabatically to volume V. The final pressure of gas will be (given γ = 3/2)