Thermodynamics

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Sodium carbonate can be made by heating sodium bicarbonate:
2NaHCO3(s) ¨ Na2CO3(s) + CO2(g) + H2O(g)
Given that ƒ¢H‹ = 128.9 kJ/mol and ƒ¢G‹ = 33.1 kJ/mol at 25‹C, above what minimum temperature will the reaction become spontaneous under standard state conditions? Report the temperature in ‹C.

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