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Refers to the separation of charge between two covalently bonded atoms.

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Bonding Orbital

A molecular orbit lower in energy than any of the atomic orbitals from which it is derived, lends stability to a molecule or ion when populated with electron.

Heterogeneous Equilibria

Equilibria involving species in more than one phase.

xylidine

Any of six isomeric compounds that have the formula C8H11N, are derivatives of xylene, and resemble aniline: used in dye manufacture.

Reaction Stoichiometry

Description of the quantitative relationships among substances as they participate in chemical reactions.

Potential Energy

Energy that matter possesses by virtue of its position, condition or composition.

Heat of Condensation

The amount of heat that must be removed from one gram of a vapor at it's condensation point to condense the vapour with no change in temperature.

Enantiomer

One of the two mirror-image forms of an optically active molecule.

Law of Conservation of Matter and Energy

The total amount of matter and energy available in the universe is fixed.

Heat of Solution

The amount of heat absorbed in the formation of solution that contains one mole of solute, the value is positive if heat is absorbed (endothermic) and negative if heat is released (exothermic).

Heisenberg Uncertainty Principle

It is impossible to determine accurately both the momentum and position of an electron simultaneously.