Chemistry, 21.01.2021 01:20 jdeelc

13. Pour éteindre un feu de cuisine, rien de mieux que le bicarbonate de sodium. Sous l'effet de la chaleur, il se décompose pour produire de l'oxyde de disodium, du dioxyde de carbone et de la
vapeur d'eau, des substances qui contribuent à étouffer le feu. Voici l'équation de la réaction:
2 NaHCO3(s) → Na2O(6) + 2 CO2(g) + H2O(g)
AH = +228,4 kJ/mol de NaHCO
Le type de feu le plus courant en cuisine provient de la combustion d'un corps gras, comme
l'huile végétale utilisée pour la cuisson des aliments. Si la chaleur massique de combustion
des corps gras est en moyenne de 38,9 kJ/g, quelle quantité d'huile faut-il pour décomposer
25,0 g de bicarbonate de sodium?

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13. Pour éteindre un feu de cuisine, rien de mieux que le bicarbonate de sodium. Sous l'effet de la...

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