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An experimentally determined (proportionality) constant, which is different for different reactions and which changes only with temperature, k in the rate-law expression: Rate = k [A] x [B]v.

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Endothermic

Describes processes that absorb heat energy.

Electrical Conductivity

Ability to conduct electricity.

Alpha Particles

A helium nucleus.

Specific Rate Constant

An experimentally determined (proportionality) constant, which is different for different reactions and which changes only with temperature, k in the rate-law expression: Rate = k [A] x [B]v.

Halogens

Group VIIA elements: F, Cl, Br, I

Polymer

A large molecule consisting of chains or rings of linked monomer units, usually characterized by high melting and boiling points.

Heterogeneous Equilibria

Equilibria involving species in more than one phase.

Cation

A positive ion, an atom or group of atoms that has lost one or more electrons.

Energy

The capacity to do work or transfer heat.

Effective Collisons

Collision between molecules resulting in a reaction, one in which the molecules collide with proper relative orientations and sufficient energy to react.