Sodium carbonate can be made by heating sodium bicarbonate:
2 NaHCO3(s) → Na2CO3(s) + CO2(g) + H2O(g).
Given that ΔH° = 128.9 kJ/mol and ΔG° = 33.1 kJ/mol at 25°C, 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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