Vapor pressure of water at equilibrium for the reaction given at 35 ° C on a hot summer day has to be calculated. C o C l 2 ( s ) + 6 H 2 O ( g ) ⇌ [ C o ( H 2 O ) 6 ] C l 2 ( s ) Concept Introduction: Standard free energy change of a reaction is related to equilibrium constant of a reaction involving a gas as, Δ G ° = − RT ln K p Where, Δ G ° = standard free energy change R = Universal gas constant T = Temperature K p = equilibrium constant Standard free energy change of a reaction is also related to standard enthalpy change and entropy change as follows, Δ G ° = Δ H ° − T Δ S °

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Chapter 16, Problem 16.130CHP

Interpretation Introduction

Interpretation:

Vapor pressure of water at equilibrium for the reaction given at 35°C on a hot summer day has to be calculated.

CoCl2(s)+6H2O(g)⇌[Co(H2O)6]Cl2(s)

Concept Introduction:

Standard free energy change of a reaction is related to equilibrium constant of a reaction involving a gas as,

ΔG°=− RT ln Kp

Where,

ΔG° = standard free energy changeR = Universal gas constantT = TemperatureKp = equilibrium constant

Standard free energy change of a reaction is also related to standard enthalpy change and entropy change as follows,

ΔG°=ΔH°−TΔS°

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