If the source and sink of a cannot engine is at 500 K and 300 K, then what will be the percentage change in efficiency if the source temperature is reduced to 450 K.

The change in entropy of the system in a process AtoBtoC is 25J*K^(-1) . If the change in entropy of the system in the step BtoC is 15 J*K^(-1) , then what will be the change in entropy of the system in the step BtoA ?

The equilibrium constant of a reaction is 0.008 at 298 K. The standard free energy change of the reaction at the same temperature is

When an open vessel is heated from 300 K to 500 K, what percentage of the gas will escape out ?

A spherical air bubbles is rising from the depth of a lake when pressure is P atm and temperature is T K what is the percentage increase in its radius when it comes to the surface of a lake. (Assume : temperature and pressure at the surface to be respectively 2T K and P/4 )

Two Carnot engines A and B operate respectively between 500 K and 400 K and 300 K. What is the difference in their efficiencies (in percentage)?

Which one is higher temperature 30^@C and 300K?

The efficiency of a Carnot engine is 50%. The temperature of the heat sink is 27^(@)C . Find the temperature of the heat source.

The efficiency of a Carnot engine is 50%. The temperature of the heat sink is 27^@C . Find, the temperature of the heat source.