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Chemical Reactions
| Term | Definition |
|---|---|
| Activation Energy | What is needed to start a chemical reaction. |
| Arrow(-->) | You read the arrow as yields. in a chemical equation or formula |
| Characteristics of a Chemical Reaction | Changes in properties (produce a gas (bubble form) color change,precipitate forms or temperature change) |
| Chemical Change | Alter the chemical properties of matter; new substances with new properties are formed. |
| Chemical Equations | A shorter, easier way to show chemical reactions by using symbols instead of words. |
| Coefficient | A number placed in front of a chemical formula in a equation. tells how many the total mass of the reactant and product take part in reaction. |
| Conservation of Mass | The amount of matter involved in a chemical reaction does not change. The total mass of the reactants must equal the total mass of the products. |
| Controlling of rates of reactions | Controlling, temperature ,surface area,catalysts,enzymes |
| Decomposition | A compound breaks into simpler substances |
| Endothermic Reaction | An observation change in energy that shows a chemical reaction took place a reaction that takes heat from the solution absorbs energy makes it feel cooler. |
| Exothermic Reaction | An observation change in energy that shows a chemical reaction took place that releases heat; gives off energy makes it feel warmer most chemical reactions are this type |
| Physical Changes | Alter only the physical properties of matter ; no new substances are formed can be a change in size shape or color change in phase |
| Precipitate | A solid that forms from solution during a chemical reaction; observable change shows a chemical reaction took place. |
| Products | the materials you have after a chemical reaction; written on the right side of the formula |
| Reactants | Reactants: the materials you have at the beginning of a chemical reaction; written on the left side of the formula |
| Replacement Reaction | : one part of a compound is displaced by an element or compound from another substance (also called displacement reaction) |
| States of Matter | States of Matter (pp. 46-50): solid, liquid, and gas |
| Subscripts: | Subscripts: show the number of atoms of an element in a molecule or the ratio of elements in a compound. |
| Synthesis Reaction | two substances combine to form a new compound (also called composition reaction) |
Created by:
johnbon
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