# Be sure to answer all parts. Calculate the standard free-energy changes for the following reactions at 25°C: (a) H2(g) + Br2(l)→2HBr(g)                                  kJ/mol (b) 2C2H6(g) + 7O2(g)→4CO2(g) + 6H2O(l)                                  kJ/mol

Question
Asked Nov 20, 2019
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Be sure to answer all parts.

Calculate the standard free-energy changes for the following reactions at 25°C:

 (a) H2(g) + Br2(l) → 2HBr(g)

kJ/mol

 (b) 2C2H6(g) + 7O2(g) → 4CO2(g) + 6H2O(l)

kJ/mol

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Step 1

The standard free-energy change of any reaction is calculated by the formula shown below.

Step 2

Part (a)

The given reaction is show below.

Step 3

The standard Gibbs free energy formation of HBr (g) is -53.51 kJ/mol.

The standard Gibbs free energy formation of H2 (g) is 0 kJ/mol.

The standard Gibbs free energy form...

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