Solution.
We write down the formulas for changing the Gibbs free energy of a chemical reaction:
"\\Delta G = \\Delta G(products) - \\Delta G(start \\ material)"
Write down the equation of the chemical reaction and equalize:
"2H2O2 = 2H2O + O2"
"\\Delta G = (2 \\times (-288.6) + 0) - (2 \\times (-120.4)) = -336.4 \\ \\frac{kJ}{mole}"
"\\Delta G<0,"
therefore, the reaction is spontaneous. However, this reaction under normal conditions practically does not occur or with a low reaction rate. In this reaction, catalysts are used, for example, metal ions (iron, chromium), iodine or manganese oxide (4).
Answer:
"\\Delta G = -336.4 \\ \\frac{kJ}{mole}"
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