Chemistry B Equations Packet
Exothermic
Chemical reactions that produce or release heat
Endothermic
Chemical reactions that require heat to be added in order to occur
Decomposition Reactions
Compounds are broken apart to form elements, or in some cases, complex compounds are decomposed to form simpler compounds
Solvent
During a physical change the thing that causes or does the dissolving
Composition Reaction
Elements combines to form a compound or in some cases simple compounds combine to form a more complex compound
Products
Materials that are formed as a result of chemical reaction
Law of Conservation of Matter
Matter is neither created nor destroyed during a chemical reaction
Coefficients
Number in front of the element that tells you the number of molecules of that element
Single Replacement
One element takes the place of a second element In a compound
Physical Change
Only changes the state of matter (solid,gas,or liquid) or dissolves the substance
Chemical Change
Produces new substances with new properties
Subscripts
The smaller number placed lower next to the element that tells you the number of atoms in each element
Precipitate
The solid formed during a chemical reaction
Reactants
The starting material in a chemical reaction
Solute
The thing that gets dissolved during a physical change
Combustion Reactions
This reaction is a specific type of decomposition and fuel burns by reacting with oxygen. The fuel in this reaction is generally hydrocarbon. The product of combustion is carbonic acid, which then decomposes into carbon dioxide water and energy
Double Replacement
Two compounds reacting with each other : the positive ion of one compound combines with the negative ion of the second compound and vice versa