Phase Diagrams

Here are the phase diagrams that I need to know. 

 Notice that as a phase change is occuring the temperature remains dormant. Also notice that under the right conditions a solid can sublimate into a gas and a gas can deposite into a solid.

Energy In Reactions

Here's something weird: In an exothermic reaction, energy is released into the surroundings, making them very hot... in chemistry, we learn that this means that the chemical reaction is actually getting COLDER. Due to the release of energy (a net loss) the system is losing energy and heat therefore. The same is true of the opposite, endothermic. They make the surroundings cold by sucking out energy from surroundings, therefore gaining it and becoming WARMER.
https://www.khanacademy.org/test-prep/mcat/chemical-processes/thermochemistry/a/endothermic-vs-exothermic-reactions

Energy Intro

We've begun learning about energy and how it affects matter and that matter's states. A couple of thing happen when energy is given to matter. 1. It heats up. 2. The molecules that compose it move more quickly and bump into each other more. 3. A phase change can occur.