Thermodynamics Terms

Initially two gas samples and are at the same condition. The volume of the two are halved, one isothermally and the other adiabatically. What is the relation between the final pressure and ?

In the adiabatic compression, the decrease in volume is associated with

In the equation = constant, the value of is unity. Then the process is

An ideal refrigerator has a freezer at a temperature of . The coefficient of performance of the engine is . The temperature of the air (to which heat is rejected) is

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

A solid body of constant heat capacity is being heated by keeping it in contact with reservoirs in two ways : (i) Sequentially keeping in contact with reservoirs such that each reservoir supplies same amount of heat. (ii) Sequentially keeping in contact with reservoirs such that each reservoir supplies same amount of heat. In both the cases body is brought from initial temperature to final temperature . Entropy change of the body in the two cases respectively is :