Question

Identify the correct statement for change of Gibb's energy for a system $\left(\Delta \mathrm{G}_{\text {system }}\right)$ at constant temperature and pressure: a. if $\Delta \mathrm{G}_{\text {system }}=0$, the system is still moving in a particular direction b. if $\Delta \mathrm{G}_{\text {system }}=-\mathrm{ve}$, the process is not spontaneous c. if $\Delta \mathrm{G}_{\text {system }}=+\mathrm{ve}$, the process is spontaneous d. if $\Delta G_{s y s c m}=0$, the system has attained equilibrium

Name: Problem 13, Chapter 4: Physical Chemistry for IIT JEE
Uploaded: 2022-01-30T13:21:01-08:00
Duration: 1 min 3 s
Channel: Amita Prajapat
Description: Identify the correct statement for change of Gibb's energy for a system (ΔGsystem ) at constant temperature and pressure: a. if ΔGsystem =0, the system is still moving in a particular direction b. if ΔGsystem =-ve, the process is not spontaneous c. if ΔGsystem =+ve, the process is spontaneous d. if ΔGs y s c m=0, the system has attained equilibrium

   Identify the correct statement for change of Gibb's energy for a system $\left(\Delta \mathrm{G}_{\text {system }}\right)$ at constant temperature and pressure:
a. if $\Delta \mathrm{G}_{\text {system }}=0$, the system is still moving in a particular direction
b. if $\Delta \mathrm{G}_{\text {system }}=-\mathrm{ve}$, the process is not spontaneous
c. if $\Delta \mathrm{G}_{\text {system }}=+\mathrm{ve}$, the process is spontaneous
d. if $\Delta G_{s y s c m}=0$, the system has attained equilibrium

Physical Chemistry for IIT JEE

Atul Singha 1st Edition

Chapter 4, Problem 13

Instant Answer

Solved by Expert Amita Prajapat

01/30/2022

Step 1

Step 1: The Gibbs free energy change, denoted as $\Delta G_{system}$, is given by the equation $\Delta G_{system} = \Delta H - T\Delta S$, where $\Delta H$ represents the change in enthalpy, $T$ is the temperature, and $\Delta S$ is the change in entropy. Show more…

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Identify the correct statement for change of Gibb's energy for a system $\left(\Delta \mathrm{G}_{\text {system }}\right)$ at constant temperature and pressure: a. if $\Delta \mathrm{G}_{\text {system }}=0$, the system is still moving in a particular direction b. if $\Delta \mathrm{G}_{\text {system }}=-\mathrm{ve}$, the process is not spontaneous c. if $\Delta \mathrm{G}_{\text {system }}=+\mathrm{ve}$, the process is spontaneous d. if $\Delta G_{s y s c m}=0$, the system has attained equilibrium

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Key Concepts

Spontaneity

Spontaneity in thermodynamic processes is determined by the sign of the change in Gibbs free energy (?G). A negative ?G indicates that the process occurs spontaneously, while a positive ?G indicates non-spontaneity. This concept is fundamental in predicting whether a reaction will proceed under given conditions without external intervention.

Equilibrium

At equilibrium, the change in Gibbs free energy (?G) becomes zero, indicating no net change in the system. This means that the forward and reverse reactions occur at the same rate, and the system remains in a state of balance with no overall tendency to change.

Gibbs Free Energy

Gibbs free energy is a thermodynamic potential that combines a system's enthalpy and entropy to predict the direction of chemical processes at constant temperature and pressure. It provides a criterion for spontaneous processes and is defined as G = H - TS, where H is enthalpy, T is temperature, and S is entropy.

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