1) Given the values of delta H rxn, delta Srxn, and T below, determine delta S unv

Part A

delta H rxn,= 84kJ, delta S rxn, =141J/K, T= 308K

Part B

delta H rxn,=84kJ, delta S rxn, 141J/K, T=755K

Part C

delta H rxn,=84kJ, delta S rxn, = -141J/K, T=308K

Part D

delta H= -84 kJ, delta S= 141J/K, T=395K

Part E

Predict whether or not the reaction in part A will be spontaneous

Part F

Predict whether or not the reaction in part B will be spontaneous

Part G

Predict whether or not the reaction in part C will be spontaneous

Part H

Predict whether or not the reaction in part d will be spontaneous

2) The chemical reaction that causes iron to corrode in air is given by 4Fe +3O2-------- 2Fe2O3 in which delta H rxn= -1684 kJ, delta S rxn= -543.7 kJ

Part A

What is the standard Gibbs free energy for this reaction? Assume the commonly used standard reference temperature of 298K

Part B

What is the Gibbs free energty for this reaction at 3652K? Assume that delta H and delta S do not change with tenperature.

Part C

At what temperature Teq do the forward reverse corrosion occur in equilibruim?