Which type of chemistry would deal with models of reactions?

How have the greenhouse gasses increased from the year 2000 to 2018

What will most likely happen when two bromine atoms bond together?

How is energy related to the change of state represented by the model? atoms gain energy as a solid changes to a liquid. atoms gain energy as a solid changes to a gas. atoms lose energy as a solid changes to a liquid. atoms lose energy as a solid changes to a gas.