Chemical energy is released or absorbed from reactions in various forms. The mos

Question

Chemical energy is released or absorbed from reactions in various forms. The most easily measurable form of energy comes in the form of heat, or enthalpy. The enthalpy of a reaction can be calculated from the heats of formation of the substances involved in the reaction: ??1rxn (products)-??? (reactants) Entropy change, ASo, is a measure of the number of energetically equivalent microstates introduced into the system during the reaction. The degree of spontaneity of a reaction is represented by the Gibbs free energy, AGo. The Gibbs free energy depends on both the enthalpy and entropy changes that take place during the reaction: AGAH TASo where T is standard temperature, 298 K.

Explanation / Answer

As it was hinted we will use ?H for one mole of A

?G=?H-T?S

?G=104.5×10^3-298(39)=92.88 kJ/mol

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