Related Words

Reaction: A decline in prices following an advance. Opposite of rally.

Standard Entropy Of Reaction: A change in entropy associated with a reaction involving substances in their standard states. A superscript circle (°) distinguishes standard enthalpy changes from enthalpy changes which inv . . . View Full Definition

Standard Enthalpy Of Reaction: A change in enthalpy associated with a reaction involving substances in their standard states.

Second Order Reaction: A reaction with a rate law that is proportional to either the concentration of a reactant squared, or the product of concentrations of two reactants.

Reaction Formation: A defense mechanism, operating unconsciously, in which a person adopts affects, ideas, and behaviours that are the opposites of impulses harboured either consciously or unconsciously. For ex . . . View Full Definition

Reduction Half Reaction: That part of a redox reaction that involves gain of electrons. In the oxidation half reaction, the oxidation number of one or more atoms within the reactants is reduced.

Zero Order Reaction: A reaction with a reaction rate that does not change when reactant concentrations change.

Thermonuclear Reaction: A reaction in which atomic nuclei fuse into new elements with a large release of heat: especially a reaction that is self-sustaining. Occasionally used to include fission reactions as well.

Reversible Reaction: A chemical reaction which can proceed in either direction, depending on the concentration of reacting materials.

Reaction Series: A series of interactions between a melt and mineral crystals in contact with the melt. In a reaction series the first formed crystals (highest temperature minerals) react with the melt to pr . . . View Full Definition