What is the equilibrium constant for the thermodynamic data given? Please show work for better understanding.

Question

Equilibrium constant for the reaction?

Given the thermodynamic data in the table below, calculate the equilibrium constant for the reaction:

2 SO2 (g) + O2 (g) 2 SO3 (g)

Substance deltaHf° (kJ/mol) delta° (J/mol · K)

SO2 (g) -297 249

O2 (g) 0 205

SO3 (g) -395 256

Answer 1

For the hypothetical chemical reaction

a A + b B  c C + d D

the equilibrium constant is defined as :

KC = [C]^c [D]^d / [A]^a [B]^b

The notation [A] signifies the molar concentration of species A. An alternative expression for the equilibrium constant involves partial pressures.

KP = PC^c PD^d / PA^a PB^b

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http://www.chemguide.co.uk/physical/equi...

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