Callen H.B - Thermodynamics And An Introduction To Thermostatistics · Problem 13.2-5

IRREVERSIBLE THERMODYNAMICS

Physics — Statistical Mechanics · chemical-reactions-ideal-gases

Problem

The equilibrium constant of the reaction

\text{SO}_3 \rightleftharpoons \text{SO}_2 + \tfrac{1}{2}\text{O}_2

has the value

171.9\ \text{Pa}^{1/2}

T = 1000

K. Assuming 1 mole of

\text{SO}_2

and 2 moles of

\text{O}_2

are introduced into a vessel and maintained at a pressure of 0.4 MPa, find the number of moles of

\text{SO}_3

present in equilibrium.