Question

1. (a) explain the physical meaning of affinity. (b) What is the value in chemical equilibrium?...

1. (a) explain the physical meaning of affinity.

(b) What is the value in chemical equilibrium?

(c) as reactant species are consumed more, is the affinity reduced or increased? Show your reasoning. (10 points)

2. Calculate the Gibbs Free Energy Change and evaluate the possibility of the following reaction:

CH4 (g) + 2O2 (g) à CO2 (g) + 2H2O (l) (15 points)

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Homework Answers

Answer #1

1.1.an attraction foce beween molecules that causes them to combine or the tendency of molecule to associate eith one another is called affinity ( chemistry)

2.affinity wil be constant( equilibrium constant Kb value) at chemical equilibrium

3. when more reactants are consumed the affinity will be more , the more reactants consumed more will be the product formation. the affinity will be high for that reaction.

2. free energy change for the given reaction is

G= H-TS

the given recation is combustion recation and delta H value is negitive for this recation that is = -890.3 kJ

assume that K= 298k

the free energy change will be potive as the numebr of molecules increases.

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