AP Chemistry / Unit 6: Thermochemistry
6.1 Endothermic and Exothermic Processes
Notes
- Exothermic: releases heat to the surroundings; $\Delta H<0$; surroundings get warmer.
- Endothermic: absorbs heat; $\Delta H>0$; surroundings get colder.
Practice
An ice pack gets cold when activated. The process is:
It absorbs heat from your skin.
Combustion is:
Releases heat.
For an exothermic reaction, $\Delta H$ is:
Heat leaves the system.
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