Question

which of the following conditions guarantee that a reaction is spontaneous at constant T and P?

1 गुण

Entropy of system increases

Enthalpy of system decreases

Entropy of system decreases and that of surrounding increases

Gibbs Gibbs energy of the system decreases

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Answer 1

The following conditions guarantee that a reaction is spontaneous at constant T and P:

(D) Gibbs energy of the system decreases

​- Gibbs energy is denoted as:

ΔG = ΔH - T ΔS

- At constant T and P, Gibbs energy tells us the following:

• If the change in Gibbs energy (ΔG) is negative (i.e., ΔG < 0) then the process is spontaneous.

• If the change in Gibbs energy (ΔG) is positive (i.e., ΔG > 0) then the process is non spontaneous.