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Purpose To conduct experiments and to determine whether they are physical or chemical changesBefore we conduct these experiments there are some topics that we must discuss As I stated in the purpose in this lab we are going to be looking at some experiments and we have to determine whether they are a cause of chemical or physical changes The purpose for all the labs that we will be doing will be the same During a chemical change a new substance is formed it is irreversible and it is usually accompanied by energy changes In comparison during a physical change no new substance is formed it is easily reversible and it is usually accompanied by energy changes An example of an energy change would be heat or light Just to give you can example of a chemical change this would be burning a piece of wood This is because the wood is mixed in with oxygen to make a change The name of the starting substances during a chemical change is reactants and the name of the new substance is the product An example of a physical change would be water to ice because the ice can easily be changed by into water but by the change of temperature this physical change occurs When mixing chemicals together it is important to understand what solvent and solute is Solute is the solid that is dissolved in the liquid The name of the liquid is the solvent It is important to know this because in experiment one mixed solvents and solutes together quite frequently Before conducting any experiment it is very important to take note of what type of state ones materials are in There are three different types of states that we will look at now are Solid Liquid and Gas A solid has a definite shape and is tightly packed and very close to each other that they cant move An example of a solid
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