.林書敏、張敬恩、陳柏全-大象牙膏（放熱反應）
(Elephant Toothpaste: Effects of Heat Release)

實驗證明過氧化氫可以被催化分解，產生水和氧氣。過氧化氫在一般情況下也可以分解成水和氧氣，但是反應速度極慢，甚至觀測不到。在大象牙膏加入碘化鉀作為催化劑，會加速生成大量氧氣。以洗碗精裡的界面活性劑作用為例，洗碗時翻動水使空氣進入水中，界面活性劑就會把空氣包住，形成小泡泡。大象牙膏就是利用此原理，過氧化氫因為碘化鉀的催化，產生了大量的水和氧氣，此時界面活性劑就會包住氧氣，產生大量的泡泡。

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 Experiments have proven that (H₂O₂) can increase its chemical reaction through catalysis and split to become water and oxygen. Typically, hydrogen peroxide can split to become water and oxygen under normal circumstances, but the reaction is extremely slow and can hardly be noticed. By using the potassium iodide as the catalyst in the elephant toothpaste, oxygen will rapidly be produced. For example:  Using the surfactant in dish washing liquid as an example; when you flip the plate while washing the dishes, the air will enter the water, in which the surfactant will then trap the air within to form into many bubbles. The making of elephant toothpaste is based on this principle. Because the potassium iodide acts as the catalyst for the hydrogen peroxide, the hydrogen peroxide will result in large amounts of water and oxygen; the surfactant will then wrap around the oxygen and form into large amounts of bubbles.

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