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This question already has an answer here:

I know why sprayed gas is cooler due to evaporation thru different pressures, but I can't understand why is the can temperature always lower than environment?

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marked as duplicate by Kyle Kanos, rob, John Rennie, ACuriousMind, Ryan Unger May 2 '15 at 14:13

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

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The can is acting as a compact heat pipe. When you grasp the can, the liquified gas inside the can absorbs the heat from your hand and expands, carrying the heat away in convective currents that dissipate the heat to other parts of the surface that are at a lower temperature than your hand. Since it draws heat from your hand it feels cool to the touch.

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