A system undergoes a change from a given initial state to a given final state either by an irreversible process or by a reversible process, then (where, Δ S1 and Δ SR are the entropy changes of the system for the irreversible and reversible processes respectively) ?

Related Mcqs:

Pick out the correct statement?

A. Like internal energy and enthalpy, the absolute value of standard entropy for elementary substances is zero B. Melting of ice involves increase in enthalpy and a decrease in randomness C. The internal energy of an ideal gas depends only on its pressure D. Maximum work is done under reversible conditions...

Pressure-enthalpy chart is useful in refrigeration. The change in internal energy of an ideal fluid used in ideal refrigeration cycle is_____________________?

A. Positive B. Negative C. Zero D. Infinity...

Which of the following is not a reversible process ?

A. Expansion of an ideal gas against constant pressure B. Atmospheric pressure vaporisation of water at 100°C C. Solution of NaCl in water at 50°C D. None of these...

Melting of wax is accompanied with ______________ in entropy?

A. Increase B. Decrease C. No change D. None of these...

In the equation, PVn = constant, if the value of n = 1, then it represents a reversible _____________ process?

A. Isothermal B. Isobaric C. Polytropic D. Adiabatic...