Problem: Use the table below to answer the questions that follow.The value of G° at 25 °C for the decomposition of calcium chloride into its constituent elements, is __________ kJ/mol.

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We’re being asked to determine the ΔG° at 25 °C for the decomposition of calcium chloride.


Calcium Chloride (CaCl2) decomposes into solid calcium (Ca) and gaseous Chlorine (Cl2)

CaCl2(s)  Ca(s) + Cl2(g)


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


ΔG°rxn=ΔG°f, prod-ΔG°f, react


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Problem Details

Use the table below to answer the questions that follow.

The value of G° at 25 °C for the decomposition of calcium chloride into its constituent elements, 

is __________ kJ/mol.

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