THERMODYNAMICS: INTERVIEW SHORT MULTIPLE CHOICE QUESTION ANSWERS ( MCQ) ON ENTROPY AND THERMODYNAMIC CYCLES Entropy of a refrigerant is zero in S.I. units at a temperature of 00C -400C +1000C (None Ans: (ii) Change of entropy during heating at constant pressure is equal to Cpln(T2/T1) Cpln(V2/V1) Cpln(T2/T1)+ Cpln(V2/V1) None Ans: (i) Change of entropy […]
INCREASE OF ENTROPY PRINCIPLE ∇S = S2 – S1 =[ ∫(δq/T) + Sgen] > ∫(δq/T) (System) (entropy change)= ( entropy change (Entropy due to heat transfer)+ due to heat generation) As per this principle in any thermodynamic system (isolated, open and closed […]
ENTROPY FROM SECOND LAW OF THERMODYNAMICS Clausius inequality states that over a complete cycle ∫(δq/T) ≤0 Where δq is the differential heat transfer & T is the absolute temperature at the boundary where the heat transfer δq occurs Clausius inequality is applicable for all cycles. There will no change of entropy if returns to […]
Definition of Entropy, Units, Symbols, Temperature Entropy Chart and Pressure Enthalpy Chart ENTROPY Entropy is measure of disorder. More is the disorder, more will be entropy. A small amount of gas in a certain room will have more entropy than that with the same gas with more mass in the same room.Entropy can also be […]