Problem: Consider the following reaction: I2(g) + Cl2(g) ⇌ 2 ICl(g), Kp = 81.9 at 25 ˚C. Calculate ΔGrxn for the reaction at 25 ˚C under each of the following conditions:PICl = 2.61 atm, PI2 = 0.321 atm, PCl2 = 0.217 atm

FREE Expert Solution

Grxn=G°rxn+RTlnQ


Step 1:

I2(g) + Cl2(g) ⇌ 2 ICl(g)

ΔG° I2(g) = 19.3 kJ/mol
ΔG° Cl2(g) = 0 kJ/mol (standard state)
ΔG° ICl(g) = -5.5 kj/mol


ΔG°rxn=ΔG°f, prod-ΔG°f, react

ΔG°rxn=(2 mol ICl)-5.5 kJ1 mol ICl           -(1 mol I2)19.3 kJ1 mol I2+0

ΔG°rxn = -30.3 kJ

ΔG°rxn=-30.3 kJ×103 J1 kJ

ΔG°rxn = -30300 J


Step 2:

PICl = 2.61 atm, PI2 = 0.321 atm, PCl2 = 0.217 atm

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Problem Details

Consider the following reaction: I2(g) + Cl2(g) ⇌ 2 ICl(g), Kp = 81.9 at 25 ˚C. Calculate ΔGrxn for the reaction at 25 ˚C under each of the following conditions:

PICl = 2.61 atm, PI2 = 0.321 atm, PCl2 = 0.217 atm

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