Given the values of Hrxn, Srxn, and T below, determine Suniv. Part A H rxn= 122

Question

Given the values of Hrxn, Srxn, and T below, determine Suniv.

Part A Hrxn= 122 kJ , Srxn= 249 J/K , T= 294 K .

Part B Hrxn= 122 kJ , Srxn= 249 J/K , T= 294 K .

Part C Hrxn= 122 kJ , Srxn= 249 J/K , T= 294 K .

Part D Hrxn= 122 kJ , Srxn= 249 J/K , T= 550 K .

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.

Explanation / Answer

A) DG = DH-TDS

      = (-122*10^3)-(294*249)

     = -195.206 Kj

As DG is -ve , the process is spontaneous.

B)

DG = DH-TDS

      = (122*10^3)-(294*-249)

     = 195.206 Kj

As DG is +ve , the process is nonspontaneous.

c)

DG = DH-TDS

      = (-122*10^3)-(294*-249)

     = -487.94 Kj

As DG is -ve , the process is spontaneous.

d)

DG = DH-TDS

      = (-122*10^3)-(550*-249)

     = 14950 Kj

As DG is +ve , the process is nonspontaneous.

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