For the reaction NH4Cl (s) NH3 (g) + HCL (g) at 25 , enthalpy change DH = +177 kJ per mole and entropy change triangle DS = +285 JK^-1mol^-1.Calculate free energy change DG at 25°C and predict whether the reaction is spontaneous or not.

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Solution

Dear student

NH₄Cl = NH₃ + HCl

dG = dH - TdS
For spontaneous reaction dG should be negative.

dG = 177 X 10³ J/mol - 298K X 285 J/K-mol
dG = 92070 J/mol
OR 92.07 kj/mol

dG is positive so reaction is non spontaneous.

Regards

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For the reaction NH4Cl (s) NH3 (g) + HCL (g) at 25 , enthalpy change DH = +177 kJ per mole and entropy change triangle DS = +285 JK-1mol-1.Calculate free energy change DG at 25°C and predict whether the reaction is spontaneous or not.

Dear student NH4Cl = NH3 + HCl dG = dH - TdS For spontaneous reaction dG should be negative. dG = 177 X 103 J/mol - 298K X 285 J/K-mol dG = 92070 J/mol OR 92.07 kj/mol ​dG is positive so reaction is non spontaneous. Regards ​

For the reaction NH4Cl (s) NH3 (g) + HCL (g) at 25 , enthalpy change DH = +177 kJ per mole and entropy change triangle DS = +285 JK^-1mol^-1.Calculate free energy change DG at 25°C and predict whether the reaction is spontaneous or not.

Dear student

NH₄Cl = NH₃ + HCl

dG = dH - TdS
For spontaneous reaction dG should be negative.

dG = 177 X 10³ J/mol - 298K X 285 J/K-mol
dG = 92070 J/mol
OR 92.07 kj/mol

dG is positive so reaction is non spontaneous.

Regards