Physical And Chemical Changes Formal Report Essay

1587 Words Dec 9th, 2015 7 Pages
Lab #4: Physical or Chemical Changes Formal Report
Purpose
Everything can change from one substance to another, but the creation and the end of some objects never happen. On a beautiful day on the fourth of December in 2015, the class of SNC1D5 started a lab on different kinds of molecules. The objective of this lab was to investigate the chemical and physical changes between different substances. With chemical reactions, reactants or heat, substances can change from one substance to another that have distinct physical and chemical characteristics.
Rationale
A physical change occurs when a reaction happens that does NOT change the material that it 's made of or if the final product is mixture. Usually physical changes involve changing state, which is physically and easy to see with the naked eye. A chemical change, adjusts the material (atoms form new bonds, causing an evolution of new materials) of the original substance and creates a completely new substance.
The signs of figuring out if something is a physical or a chemical change is rather simple. A physical change happens when a substance changes state or shape or size or appearance or texture or color or temperature without changing its composition and when a mixture is created. A chemical change happens when a flame occurs or the mixture gets very hot or cold. Another sign of a chemical change is an odor is released (i.e. a gas) or a noise is heard or the substance changes color or a precipitate is created.
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