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The condition for spontaneity of process...

The condition for spontaneity of process is

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lowering the entropy at constant temperature and pressure
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The condition for spontaneity of a process is-

Discuss the conditions for spontaneity of a process .

What are spontaneous reactions? What are the conditions for the spontaneity of a process?

DeltaG of the system alone provides a criterion for the spontaneity of a process at constant temperature & pressure, DeltaG system lt 0 (spontaneous) DeltaG system = 0 (equilibrium) DeltaG system gt 0 {(non-spontaneous) Again DeltaG^@ is related to the equilibrium constant as follows : DeltaG^@ = 2.303 RT log K_e If both DeltaH and Delta S are negative, the reaction will be spontaneous

For spontaneous process—

Spontaneous process is:

Which of the following conditions favours the spontaneity of a reaction at a constant temperature and pressure? DeltaH gt0, DeltaH lt 0, DeltaS gt0, DeltaS lt 0 .

(i) Spontaneity of a process can be determined from the entropy change and also from the Gibbs free energy change. But the Gibbs free energy change in more useful than entropy change to determine the spontaneity of a process. Explain it. (ii) Show that Gibbs energy change of a system at certain temperature and pressure, DeltaG=DeltaH-TDeltaS .

What are the conditions of spontaneity and equilibrium for a process in an isolated system?

Knowledge Check

  • The condition for spontaneity of a process is-

    A
    lowering of entropy at constant temperature & pressure
    B
    lowering of gibbs free energy of the system at constantn temperature and pressure
    C
    Increase in entropy of the system at constant temperature and pressure
    D
    increase in Gibbs free energy of the universe at constant temperature and pressure.

  • DeltaG of the system alone provides a criterion for the spontaneity of a process at constant temperature & pressure, DeltaG system lt 0 (spontaneous) DeltaG system = 0 (equilibrium) DeltaG system gt 0 {(non-spontaneous) Again DeltaG^@ is related to the equilibrium constant as follows : DeltaG^@ = 2.303 RT log K_e If both DeltaH and Delta S are negative, the reaction will be spontaneous

    A
    at high T
    B
    at low T
    C
    at all T
    D
    at absolute zero

  • DeltaG of the system alone provides a criterion for the spontaneity of a process at constant temperature & pressure, DeltaG system lt 0 (spontaneous) DeltaG system = 0 (equilibrium) DeltaG system gt 0 {(non-spontaneous) Again DeltaG^@ is related to the equilibrium constant as follows : DeltaG^@ = 2.303 RT log K_e For a spontaneous reaction Delta G and K_e .......... will be respectively

    A
    `-ve, +ve`
    B
    `+ve, -ve`
    C
    zero, zero
    D
    -ve, -ve