In a spontaneous irreversible process the total entropy of the system and surroundings

In a spontaneous irreversible process the total entropy of the system and surroundings
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In a spontaneous irreversible process the total entropy of the system and surroundings A. Remains constant B. Increases C. Decreases D. Zero
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The total entropy change for a system and its surroundings increases, if the process is

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According to first law of thermodynamics  (a) work done by a system is equal to heat transferred by the system  (b) total internal energy of a system during a process remains constant  (c) internal energy, enthalpy and entropy during a process remain constant  (d) total energy of a system remains constant

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In an irreversible process (A) Tds = dE - dW = 0 (B) dE - dW - Tds = 0 (C) Tds - dE + dW < 0 (D) Tds - dT + dW < 0

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In a totally irreversible isothermal expansion process for an ideal gas, ΔE = 0, ΔH = 0. Then ΔQ and ΔS will be (A) ΔQ = 0, ΔS=0 (B) ΔQ = 0, ΔS = +ve (C) ΔQ = 0, ΔS = -ve (D) ΔQ = +ve, ΔS= +ve

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Last Answer : Internally reversible, adiabatic process

How does an adiabatic process compare to an isentropic process?  A. Adiabatic heat transfer is not equal to zero; isentropic heat transfer is zero  B. Both heat transfer = 0; isentropic: reversible  C. Adiabatic heat transfer = 0; isentropic: heat transfer is not equal to zero  D. Both heat transfer is not equal to zero; isentropic: irreversible

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Last Answer : Both heat transfer = 0; isentropic: reversible