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When heated, magnesium carbonate spontaneously decomposes to magnesium oxide and carbon dioxide:MgCO3(s) → MgO (s) +...

When heated, magnesium carbonate spontaneously decomposes to magnesium oxide and carbon dioxide:MgCO3(s) → MgO (s) + CO2(g). ΔG ̊ = ?

A sample of solid MgCO3was placed in a sealed jarand was heated to 500 ̊C until the system reachedequilibrium. The pressure of CO2at equilibrium was found to be 1.43 atm.Determine the value of ΔG ̊ for the reaction at 500 ̊C.

(a)–2.30kJ/mol

(b)–1.49kJ/mol

(c)–0.40 kJ/mol

(d)0.23 kJ/mol

(e)1.59 kJ/mol

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