Week 13 Chemical Reactions

1) Endothermic A process or reaction that absorbs energy in the form of heat and feels cool.

2) Exothermic

A process or reactions that releases energy in the form of heat and feels warm.

3) Mixture

Combining two or more different materials together in a way that no chemical reaction occurs.  The objects do not bond together.

4)  Solution

When two or more substances are put together and one dissolves into the other, usually resulting in a liquid.
5) Law of Conservation of Mass matter can be changed from one form into another, mixtures can be separated or made, and pure substances can be decomposed, but the total amount of mass remains constant.  It cannot be created or destroyed.
6) Chemical Reaction A process that results in anew substance. When two or more chemical substances interact.
7) Precipitate A number below and to the right of a symbol, telling how many atoms of that element there are in that molecule.to cause a solid substance to be separated from a solution
8) Sublimation The process of changing from a solid to a gas without passing through the liquid phase.   
9) Chemical Bond The force of attraction that holds together atoms in a compound.

10) Combustion

rapid chemical combination of a substance with oxygen, involving the production of heat and light.   Burning!!!!


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