Question

Use data from the table below to calculate the equilibrium constants at 25?C for each reaction.

Standard Thermodynamic Quantities for Selected Substances
at 25?C

Substance	?H?f(kJ/mol)	?G?f(kJ/mol)	S?(J/mol?K)
H2(g)	0	0	130.7
N2(g)	0	0	191.6
O2(g)	0	0	205.2
NO(g)	91.3	87.6	210.8
CO(g)	-110.5	-137.2	197.7
CO2(g)	-393.5	-394.4	213.8
H2S(g)	-20.6	-33.4	205.8
S2(g)	128.6	79.7	228.2

Part A

2CO(g)+O2(g)?2CO2(g)

Express your answer using two significant figures.

K =

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Part B

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

Express your answer using two significant figures.

K =

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