Ch 19 Physical Science Test

Coefficients change the number of molecules, while subscripts change the identity of the substance.

Subscripts are easier to change than coefficients.

Changing coefficients changes the substance's identity.

Coefficients and subscripts mean the same thing.

reactions that proceed only in one direction

reactions that can proceed in both forward and backward directions

reactions that never reach equilibrium

reactions that produce only one product

the mass of one mole of a substance

the number of atoms in a molecule

the volume of one mole of a gas

the charge of an ion

a reaction where two or more substances combine to form a single product

a reaction where a compound breaks down into two or more simpler substances

a reaction that involves the exchange of ions between two compounds

a reaction that releases energy in the form of heat

reactions that release energy

reactions that absorb energy

reactions that require light

reactions that occur only in plants

substances that are produced in a chemical reaction

substances that are present before a chemical reaction and take part in it

the energy released during a reaction

the products formed after a reaction

reactions that absorb heat

reactions that release heat

reactions that produce light

reactions that form precipitates

Static and dynamic equilibrium

Thermal and chemical equilibrium

Mechanical and electrical equilibrium

Stable and unstable equilibrium

a reaction where two or more substances combine to form a new compound

a reaction where a compound breaks down into two or more simpler substances

a reaction where substances exchange ions to form new compounds

a reaction where energy is absorbed from the surroundings

A theory explaining how particles interact during chemical reactions.

A method for measuring temperature.

A process for separating mixtures.

A technique for purifying water.