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The phenomenon of crystallisation comes from the dehydration of sodium ethanoate trihydrate to anhydrous sodium ethanoate. In fact, the '''trihydrate''' substance, the one we want for our heaters, liquefies if we heat it above '''58°C'''. On the other hand, the '''anhydrous''' substance only liquefies at '''324°C'''. So when you remove the water from a molecule, PAF! It becomes anhydrous and solidifies instantly, because we're well below 324°C!
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The phenomenon of crystallisation comes from the dehydration of sodium ethanoate trihydrate to anhydrous sodium ethanoate. In fact, the '''trihydrate''' substance, the one we want for our warmers, liquefies if we heat it above '''58°C'''. On the other hand, the '''anhydrous''' substance only liquefies at '''324°C'''. So when you remove the water from a molecule, PAF! It becomes anhydrous and solidifies instantly, because we're well below 324°C!

Version actuelle datée du 2 juillet 2024 à 17:42

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Définition du message (Chaufferette)
Le phénomène de cristallisation provient ici de la déshydratation l'éthanoate de sodium trihydraté vers l'éthanoate de sodium anhydre. En faite, la substance '''trihydraté''', celle que l'on souhaite pour nos chaufferette, se liquéfie si on la chauffe au delà de '''58°C'''. En revanche, la substance '''anhydre''' elle ne se liquéfie qu'à '''324°C'''. Ainsi, lorsqu'on enlève son eau à une molécule, PAF ! Elle devient anhydre et se solidifie instantanément car nous ne somme bien en dessous de 324°C !
TraductionThe phenomenon of crystallisation comes from the dehydration of sodium ethanoate trihydrate to anhydrous sodium ethanoate. In fact, the '''trihydrate''' substance, the one we want for our warmers, liquefies if we heat it above '''58°C'''. On the other hand, the '''anhydrous''' substance only liquefies at '''324°C'''. So when you remove the water from a molecule, PAF! It becomes anhydrous and solidifies instantly, because we're well below 324°C!

The phenomenon of crystallisation comes from the dehydration of sodium ethanoate trihydrate to anhydrous sodium ethanoate. In fact, the trihydrate substance, the one we want for our warmers, liquefies if we heat it above 58°C. On the other hand, the anhydrous substance only liquefies at 324°C. So when you remove the water from a molecule, PAF! It becomes anhydrous and solidifies instantly, because we're well below 324°C!