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Chemical Reaction

Activation Energy What is needed to start a chemical reation
Arrow you read the arrow as "yields" in a chemical reaction
Characteristics of a Chemical Reation changes in energy or changes in properties ( produce a gas)(bubbles form), color change, precipitate forms or temperature change.
Chemical Changes alter the chemical properties of matter; new substances with new properties are formed
Chemical Equations a shorter, easier way to show a chemical reactions by using symbols instead of words
Coefficient a number placed in front of a chemical formula in an equation. tells how many atoms or molecules of each reactant and product take part in the reactant.
Conversation of Mass the amount of matter involved in a chemical reaction does not change. the total mass of the reactant must equal the total mass of the products.
Controlling rates of reaction concentration, temperature, surface area, catalysts, enzymes, and inhibitors.
Decomposition Reaction a compound breaks down into simpler substances
Endothermic Reaction an observable change in energy that shows a chemical reaction took place. a reaction that takes heat from the solution absorbs energy and makes it feel cooler.
Exothermic Reaction an observable change in the energy that shows a chemical reaction took place. A reaction that releases heat. gives off energy, makes it feel warmer, most chemical.
Physical Changes alter only the physical properties of matter no new substances are formed. Can change in size, shape or color change in phase ( by increasing or decreasing temperature: solid, liquid, gas.
Precipitate a solid that forms from solution during a chemical reaction, observable change that shows a chemical reaction took place.
Products the materials you have after a chemical reaction, written on the right side of the formula.
Reactants the materials you have at the beginning of the 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 solid, liquid, gas
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: 150010638



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