1 7-Zip-Right-click on the file or folder you want to compress and select 7-Zip â Add to archive. 2  In the Add to Archive menu, you can set your compression options. 3  Note that increasing compression levels can significantly increase the time it takes to compress. 7-Zip-Right-click on the file or folder you want to compress and select 7-Zip â Add to archive. 2  In the Add to Archive menu, you can set your compression options. 3  Note that increasing compression levels can significantly increase the time it takes to compress.
Endothermic reactions are the opposite. The new bonds require more energy. This comes from heating the substances, or sometimes, comes from the surrounding environment. Absorbing heat energy from the environment makes everything decrease in temperature so the reaction 'feels' cooler.
Aug 26, 2015. Because they require energy. An endothermic process is one that needs to have energy added in order to take place. A simple example of an endothermic process is the melting of ice, because ice doesn't melt unless you put energy into it. This is also the case with other phase changes. If we want to boil water, we need to heat it up by pumping energy into it, and then once it boils we need to continue pumping energy into it until it has all turned to steam. However... Not all phase changes are endothermic.