Enthalpy and Gibb's Free EnergyChemical energy is released or absorbed fromreactions in various forms. The most easilymeasurable form of energy comes in the form of heat,or enthalpy. The enthalpy of a reaction can becalculated from the heats of formation of thesubstances involved in the reaction:AHxn = AH₂ (products) - AH (reactants)Entropy change, AS°, is a measure of the number ofenergetically equivalent microstates introduced intothe system during the reaction. The degree ofspontaneity of a reaction is represented by the Gibbsfree energy, AGO. The Gibbs free energy dependson both the enthalpy and entropy changes that takeplace during the reaction:AG=AH° - TAS°where T is standard temperature, 298 K.▼Part ACalculate the standard enthalpy change for the reactionwhere the heats of formation are given in the following table:ΔΗSubstance (kJ/mol)ABCD-241-407191-501Express your answer in kilojoules.► View Available Hint(s){—| ΑΣΦAHixn=2A+B=2C+2D?kJReview C

Answered: Image /qna-images/answer/fee5efb4-dd29-4c61-a02d-53187506f965.jpg

Part A Calculate the standard enthalpy change for the reaction where the heats of formation are given in the following table: ΔΗ, (kJ/mol) -241 -407 191 -501 Substance A B C D Express your answer in kilojoules. ▸ View Available Hint(s) AH = IVE ΑΣΦ 2A+B=2C+2D SAM ? kJ Review 31

Part A Calculate the standard enthalpy change for the reaction where the heats of formation are given in the following table: ΔΗ, (kJ/mol) -241 -407 191 -501 Substance A B C D Express your answer in kilojoules. ▸ View Available Hint(s) AH = IVE ΑΣΦ 2A+B=2C+2D SAM ? kJ Review 31

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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