Supercritical transition of liquid Chlorine

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Liquid Chlorine immersed into hot oil bath (ca 160C) and became supercritical. After cooling down it condensing back into liquid.
Critical temperature of the Chlorine - 143.8°C, critical pressure - 76.0 atm
Diameter of the ampule - 4 mm
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it is funny that the small glass ample is able to withstand so much pressure.

vmelkon
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As a superheated liquid is heated in a sealed container, pressure from the gas above increases until the liquid and gas states merge into a new state as a supercritical fluid which appears more like a gas. But I cannot imagine the destruction if this glass container burst in the hot oil.

pcorf
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Why is there a purple/brown flash? Is the energy involved with the state change cause some kind of electronic transistion state?

syntheticroot
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How was the ampoule sealed in the first place?

vkzay
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