Which of the following statements is false? (1) A...

Which of the following statements is false? (1) A spontaneous reaction is possible at any temperature if $\Delta \mathrm{H}<0, \Delta S<0$ (2) For a spontaneous chemical change, Gibbs energy change is negative. (3) Gibbs energy change for a reversible reaction at equilibriam is zero. (4) The relation $\Delta \mathrm{G}=\Delta \mathrm{H}-T \Delta S$ was given by GibbsHelmhotz.

Which of the following statements is false?
(1) A spontaneous reaction is possible at any temperature if $\Delta \mathrm{H}<0, \Delta S<0$
(2) For a spontaneous chemical change, Gibbs energy change is negative.
(3) Gibbs energy change for a reversible reaction at equilibriam is zero.
(4) The relation $\Delta \mathrm{G}=\Delta \mathrm{H}-T \Delta S$ was given by GibbsHelmhotz.

Key Concepts

Gibbs-Helmholtz Equation

The Gibbs-Helmholtz equation, given by ?G = ?H - T?S, provides a quantitative relationship among Gibbs free energy, enthalpy, entropy, and temperature. This equation is fundamental in predicting how changes in temperature can impact the spontaneity of a reaction by balancing the enthalpic and entropic contributions.

Equilibrium Condition

At equilibrium, the system is in a state of balance where there is no net change in concentrations, and the Gibbs free energy change for the reaction is zero. This condition signifies that the reaction is reversible and that the forward and reverse reactions occur at the same rate.

Gibbs Free Energy

Gibbs free energy is a thermodynamic potential that predicts the direction of chemical processes at constant pressure and temperature. A negative change in Gibbs free energy indicates a spontaneous process, while a positive change shows that the process is non?spontaneous, and a zero value indicates equilibrium between the forward and reverse reactions.

Spontaneity Criterion

The spontaneity of a process is determined by the sign of the Gibbs free energy change. This criterion takes into account both enthalpic and entropic contributions, meaning that even exothermic reactions with decreased entropy may not be spontaneous at all temperatures unless the overall free energy change is negative.

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