## Articles Posted in the " Entropy " Category

• ### THERMODYNAMICS: INTERVIEW SHORT MULTIPLE CHOICE QUESTION ANSWERS ( MCQ) ON ENTROPY AND THERMODYNAMIC CYCLES

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 […]

• ### * FEW IMPORTANT FACTS ABOUT ENTROPY

FEW IMPORTANT FACTS ABOUT ENTROPY (a) Difference of entropy is path independent. (b) Exothermic reactions increase entropy. Exothermic reactions are spontaneous which result in more disorder and hence increase in entropy. (c) Complexity of molecules show increase of entropy (s (propane) > s (ethane) > s(methane)) (d) Phase change from solid to liquid and liquid […]

• ### * INCREASE OF ENTROPY PRINCIPLE

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

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 and Temperature Entropy Chart and Pressure Enthalpy Chart

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 […]