In my lab experiment for the synthesis of Aspirin we used hot water to quench the reaction. Why wouldn't we use cold water but hot water?

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    $\begingroup$ You used an excess of acetic anhydride, and you want to hydrolize the unreacted fraction. The hydrolysis reaction proceeds faster at higher temperatures. $\endgroup$ – The_Vinz Dec 8 '19 at 2:22
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    $\begingroup$ In a commercial environment and larger lab scale, quenching of water sensitive reagents at too cold a temperature can lead to accumulation and then thermal runaway. Phosphorous oxychloride is notorious for this. It's sometimes safer to quench at warmer temperatures for the reason The_Vinz said, but it can be a balance. $\endgroup$ – Beerhunter Dec 8 '19 at 8:08

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