A chemical reaction that absorbs heat from the surroundings is said to be endothermic and has a positive ΔH at constant pressure.
There are two types
of reaction: endothermic reaction (chemical reaction that absorbs more
energy than it releases) and exothermic reaction (chemical reaction that
releases more energy than it absorbs).
For example, sublimation is
an endothermic
process, dry ice (carbon(IV)
oxide in solid state) is used because of sublimation
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