For the conversion of limestone to lime,CaCO_ | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(D) For a reaction to be spontaneous,the Gibbs free energy change $\Delta G$ must be negative,i.e.,$\Delta G < 0$.Given $\Delta G = \Delta H - T\Delta

Vedclass · Accepted Answer

$1118$

Vedclass · Answer

(D) For a reaction to be spontaneous,the Gibbs free energy change $\Delta G$ must be negative,i.e.,$\Delta G Given $\Delta G = \Delta H - T\Delta S$.At equilibrium,$\Delta G = 0$,so $T = \frac{\Delta H}{\Delta S}$.Substituting the values: $\Delta H = 179.1 	imes 10^3 \, J \, mol^{-1}$ and $\Delta S = 160.2 \, J \, K^{-1} \, mol^{-1}$.$T = \frac{179.1 	imes 10^3}{160.2} \approx 1118 \, K$.Since the reaction is endothermic $(\Delta H > 0)$ and entropy increases $(\Delta S > 0)$,the reaction becomes spontaneous at temperatures higher than the equilibrium temperature.Therefore,the reaction becomes spontaneous above $1118 \, K$.

Similar Questions

The standard enthalpy of the decomposition of $N_2O_4$ to $NO_2$ is $58.04 \, kJ$ and standard entropy of this reaction is $176.7 \, J/K$. The standard free energy change for this reaction at $25 \, ^oC$ is $..... \, kJ$

Identify from the following the correct set of thermodynamic conditions for the reaction to be non-spontaneous at all temperatures.

Describe Gibbs energy and spontaneity.

What is the value of $\Delta G$ for a water system in an environment with a temperature of $100 \ K$?

Which of the following conditions will oppose or prevent a reaction from occurring?

Vedclass Test Series

Exam Paper Generator

Online Exam Module