Ammonia, heat of formation

Soluble in CSg and xylene. Quantitatively decomposed by water (within one hour) to malonic acid. Forms malonamide with ammonia. Heat of formation 47.4 kcal./mole. 

Formula weight 143.46. Colorless crystals. M.p. 498°C, b.p. 1345°C d 4.72. Insoluble in HgO soluble in hydrogen halide solutions, nitric acid and aqueous ammonia. Heat of formation (25°C) — 24.9 kcal./mole. 

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