Question

Refer Appendix G in the text in order to determine the standard free energy change for each of these reactions. Determine whether or not the reaction is spontaneous under standard conditions (298 K, 1 atm). 2??3 → ?2 + 3?2 ???4 (?) + ?2 (?) → ???2 (?) + 2?2?(?) ?(???????) → ?(????ℎ???)

Answer 1

2??3 → ?2 + 3?2

G⁰ rxn   = G⁰f products - G⁰f reactants

                   = 3*0 + 0 - (2*-16.45)   = 32.9KJ/mole

G⁰ rxn >0 it is non spontaneous reaction.it not the reaction is spontaneous under standard conditions (298 K, 1 atm).

???4 (?) + ?2 (?) → ???2 (?) + 2?2?(?)

G⁰ rxn   = G⁰f products - G⁰f reactants

                 = 2*-228.572 -856.64 - (56.9 + 0)    = -1370.684KJ/mole

G⁰ <0 it is spontaneous reaction.The reaction is spontaneous under standard conditions (298 K, 1 atm).

?(???????) → ?(????ℎ???)

G⁰ rxn   = G⁰f products - G⁰f reactants

                 = 0-2.9   = -2.9KJ/mole

G⁰ <0 it is spontaneous reaction.The reaction is spontaneous under standard conditions (298 K, 1 atm).