Question

Item 29 29 of 32 Review Constants Periodic Table Calculate the change in Gibbs free energy for each of the sets of AN A S , and T given in the following problems Predict whether or not the reaction in part A wil be spontaneous at the femperature indicated. (Assume that all reactants and products are in their standard states) spontaneous nonspontaneous Submit Part F Predict whether or not the reaction in part B will and products are in their standard states.) spontaneous at the temperature indicated. (Assume that all reactants spontaneous nonspontaneous Submit

Answer 1

Part A : $\Delta$ G^o_rxn = 211.7 kJ

Part B : $\Delta$ G^o_rxn = -211.7 kJ

Part E : reaction in part A is : nonspontaneous

Part F : reaction in part B is : spontaneous

Explanation

Part A :

$\Delta$G^o_rxn = $\Delta$ H^o_rxn - (T) * ($\Delta$S^o_rxn)

$\Delta$G^o_rxn = (131 kJ) - (308 K) * (-262 J/K) * (1 kJ / 1000 J)

$\Delta$G^o_rxn = (131 kJ) + (80.696 kJ)

$\Delta$G^o_rxn = 211.7 kJ

Since $\Delta$ G^o_rxn is greater than zero, therefore, reaction is nonspontaneous.

Part B :

$\Delta$G^o_rxn = $\Delta$ H^o_rxn - (T) * ($\Delta$S^o_rxn)

$\Delta$G^o_rxn = (-131 kJ) - (308 K) * (262 J/K) * (1 kJ / 1000 J)

$\Delta$G^o_rxn = (-131 kJ) - (80.696 kJ)

$\Delta$G^o_rxn = -211.7 kJ

Since $\Delta$ G^o_rxn is less than zero, therefore, reaction is spontaneous.