The change in entropy is zero during

Related MCQs

• The entropy increase due to internal irreversibility is also called entropy production or entropy generation.
• 1.6 Kg of air is expanded at constant pressure from 100°C to 0°C resulting in entropy change of - 2.0 J/K 3.2 Kg of air is cooled at constant volume from 100°C to 0°C with a change in entropy of -3.0 J/K. The ratio Cp/ Cv is
• Entropy at absolute zero temperature is zero for a
• According to entropy principle, the entropy of an isolated system can never decrease and remains constant only when the process is reversible.
• The rate of entropy increase of the control volume          or          the net rate of entropy transfer to it.
• The rate at which entropy is transferred out must          the rate at which entropy enters the control volume.
• The unavailable energy is the product of the lowest temperature of heat rejection and the change of entropy of system during the process of supplying heat.
• The entropy of saturated water is chosen to be zero at triple point.
• For a reversible adiabatic process, the change in entropy is
• For any reversible process, the change in entropy of the system & surroundings is