Chem, chapter 9
Vocabulary for chaper 9
Terms
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- Reactants
- _______ are the starting substances in a chemical reaction.
- Exothermic reactions
- Any reaction that gives off thermal energy; the products have less energy than the reactants
- Decomposition
- The breaking up of substances into simpler substances when energy is supplied is called _________.
- Double displacement
- In _________ reactions, the positive and negative portions of two compounds are interchanged.
- Stoichiometry
- The quantitative study of chemical reactions such as mass -mass problems is called.
- Chemical reaction
- The process by which one or more substances are changed into one or more different substances is called a ________.
- Percentage yield
- The ______ of a product is expressed as actual amount of product over theoretical amount of product x 100%
- Single displacement
- In the chemical reaction known as _________, one element displaces another in a compound.
- Combustion
- The reaction of an organic compound as it burns in air is called ___________.
- Mass-mass problems
- __________ are calculations used to find the masses of materials involved in reactions.
- Endothermic reaction
- Any reaction who' products have more energy than the reactants; the container would feel could because the products take thermal energy out of the surroundings and absorb the energy into their chemical bonds
- Products
- ________ is the term referring to the substances formed by a chemical reaction.
- Mass-energy problems
- __________ involve calculating the heat of reaction from the mass of materials in a reaction.
- Synthesis
- Two or more substances combine to form one new substance in ____________ reactions.