Problem: For the reaction:2KClO3(s) → 2KCl(s) + 3O2(g)Calculate ΔGºrxn at 25ºC.Express your answer using one decimal place.

FREE Expert Solution

We’re being asked to determine the Gibbs free energy (ΔG°rxn) at 25°C for the given reaction:

2 KClO(s) → 2 KCl (s) + 3 O(g) 


We’re given the ΔH˚f and S˚ of each reactant and product:


Substance

ΔH˚f (kJ/mol)

S˚ (J/mol • K)

KClO(s)

–397.7

143.1

KCl (s)

 436.5

82.6

O(g)

0

205.2


We can use the following equation to solve for ΔG˚rxn:


ΔG°rxn=ΔH°rxn-TΔS°rxn


For this problem, we need to do the following steps:

Step 1: Calculate ΔH˚rxn.

Step 2: Calculate ΔS˚rxn.

Step 3: Use ΔH˚rxn and ΔS˚rxn to calculate for ΔG˚rxn.


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Problem Details

For the reaction:

2KClO3(s) → 2KCl(s) + 3O2(g)

Calculate ΔGºrxn at 25ºC.

Express your answer using one decimal place.

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