Use standard free energies of formation to calculate ? G ? at 25?C for each of t

Question

Use standard free energies of formation to calculate ?G? at 25?C for each of the following reactions.

Part B

2NH3(g)?N2H4(g)+H2(g)

Part C

N2(g)+O2(g)?2NO(g)

Express your answer using four significant figures.

Part D

2KClO3(s)?2KCl(s)+3O2(g)

Express your answer using four significant figures.

Part E

How do the values of ?G? calculated this way compare to those calculated from ?H? and ?S?? Which of the two methods could be used to determine how ?G? changes with temperature?

Essay answers are limited to about 500 words (3800 characters maximum, including spaces).

Explanation / Answer

Use standard free energies of formation to calculate

Delta G at 25 deg C for each of the following reactions.

Part B

2NH3 (g) --> N2H4(g)+H2(g)

We know

Delta G 0 = Sum Delta G0 of product

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