Thermodynamics PYQ

The entropy of an isolated system in an irreversible process:

A Carnot engine operates between temperatures 600 K and 300 K. Its efficiency is:

For an ideal gas undergoing an adiabatic process, if PV^γ = constant and γ = 5/3, the work done when volume changes from V₁ to 2V₁ is:

Which of the following are state functions?

A Carnot engine operates between 600 K and 300 K. Find its efficiency (in percentage).

For an ideal gas, the ratio Cp/Cv for a monoatomic gas is