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Hfdst. 13[pdf, 13628kb]

Hfdst. 13[pdf, 13628kb]

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ammoniumnitraat<br />

(1) NH 4NO 3 (v) HNO 3 (vl) + NH 3 (g) [H = +184 kJ/mol]<br />

(2) NH 4NO 3 (v) N 2O (g) + 2H 2O (g) [H = -36 kJ/mol]<br />

(3) NH 4NO 3 (v) ½ N 2 (g) + NO (g) + 2H 2O (g) [H = -28 kJ/mol]<br />

Als (2) & (3) overwegend voorkomen :<br />

H = enthalpie = negatief Exotherm (‘Zelfonderhoudend’)<br />

Massale vorming van (nitreuze) gassen<br />

NH 4NO 3 (v) N 2 (g) + 2H 2O (g) + ½ O 2 (g)<br />

Sterk exotherm<br />

Enorme gasvorming :<br />

bv. : 80 g AN leidt tot 115 liter gas (bij 150°C)<br />

Ontstaan van zuurstof

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