Sodium Carbonate Can Be Made by Heating Sodium Bicarbonate: 2NaHCO₃(s)

question 62

Multiple Choice

Sodium carbonate can be made by heating sodium bicarbonate: 2NaHCO₃(s) → Na₂CO₃(s) + CO₂(g) + H₂O(g)
At 25°C, for this reaction, ΔH°_rxn = 128.9 kJ/mol and ΔG°_rxn = 33.1 kJ/mol. Above what minimum temperature will the reaction become spontaneous under standard state conditions?

• A) 0.4 K
• B) 3.9 K
• C) 321 K
• D) 401 K
• E) 525 K

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