19. Chemical Thermodynamics - Part 2 of 2
19. Chemical Thermodynamics / Entropy Calculations / Problem 2
Decarboxylation reactions are those in which a carboxyl group is removed and releases CO2. The following reaction shows the decarboxylation of malonic acid:
(CH2(COOH)2)(s) → CH3COOH(l) + CO2(g)
Assume that ΔH° and ΔS° do not vary with temperature, determine the minimum temperature at which this reaction will occur spontaneously under standard conditions.
ΔH° (kJ/mol) S° (J/mol•K)
(CH2(COOH)2)(s) –891.1 149.0
CH3COOH(l) –487.0 159.8
CO2(g) –393.5 213.6
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