We’re being asked to determine the Standard entropy change for the given reaction:
2 Mg(s) + O2(g) → 2 MgO(s)
We can use the following equation to solve for ΔS˚rxn:
Note that we need to multiply each S˚ by the stoichiometric coefficient since S˚ is in J/mol • K.
Calculate the standard entropy change for the reaction
2Mg(s) + O2(g) → 2MgO(s)
using the data from the following table:
|Substance||?H?f (kJ/mol)||?G?f (kJ/mol)||S? [J/(K?mol)]|
Express your answer to four significant figures and include the appropriate units.
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What scientific concept do you need to know in order to solve this problem?
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