Here again is the balanced equation for the formation of hydrogen gas (H2(g)) that took place in the test tube when Zn(s) and HCl(aq) were combined: 2 HCl(aq) +  Zn(s)--> H2(g) + ZnCl2(aq) This enthalpy and entropy values for this reaction are Δ H = − 80.7 k J and Δ S = 0.0140 k J K. If you perform this reaction at 25.0 degrees Celsius, what is the free energy change (in kJ) for this reaction? Round your answer to three significant figures

Chemistry: The Molecular Science
5th Edition
ISBN:9781285199047
Author:John W. Moore, Conrad L. Stanitski
Publisher:John W. Moore, Conrad L. Stanitski
Chapter16: Thermodynamics: Directionality Of Chemical Reactions
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Here again is the balanced equation for the formation of hydrogen gas (H2(g)) that took place in the test tube when Zn(s) and HCl(aq) were combined:

2 HCl(aq) +  Zn(s)--> H2(g) + ZnCl2(aq)

This enthalpy and entropy values for this reaction are Δ H = − 80.7 k J and Δ S = 0.0140 k J K. If you perform this reaction at 25.0 degrees Celsius, what is the free energy change (in kJ) for this reaction? Round your answer to three significant figures

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Step 1

Any reaction whether it will be spontaneous or not can be known from the change its Gibbs free energy . If it is negative then the reaction is spontaneous otherwise if it is positive then non spontaneous and if it is 0 then it is in equilibrium .

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