Show that the entropy change in an irreversible process is always positive.

Which is an irreversible process ?

Show that the entropy changes in a reversible isothermal process is zero.

Entropy change for an adiabatic reversible process is

For an irreversible process, DeltaS gt 0 .

Which of the following are irreversible processes

Which of the following expression for entropy change of an irreversible process ?

Calculate the total entropy change for the following reversible processes: a. Isothermal b. Adiabatic

Find work done in the irreversible process C to A .

Growth is irreversible process found at organisation level

Entropy ( S ) is a thermodynamic variable like pressure P , volume V and temperature T . Entropy of a thermodynamic system is a measure of disorder of molecular motion. Greater is disorder , greater is entropy. Change in entropy of a thermodynamic system is the ratio of heat supplied to absolute temperature.In an adiabatic reversible process, entropy remains constant while in any irreversible process entropy increases. In nature the processes are irreversible , therefore entropy of universe is continuoulsy increasing. The unit of entropy in S-I system is -