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A thermodynamic state or property that measures the degree of disorder or randomness of a system.

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Surface Tension

It is the force in dynes acting along the surface of the liquid 1cm in length and perpendicular to it.

Water Equivalent

The amount of water that would absorb the same amount of heat as the calorimeter per degree temperature increase.

Transition State Theory

Theory of reaction rates that states that reactants pass through high-energy transition states before forming products.

Band Theory of Metals

Theory that accounts for the bonding and properties of metallic solids.

Molecular Formula

Formula that indicates the actual number of atoms present in a molecule of a molecular substance.

Hess' Law of Heat Summation

The enthalpy change for a reaction is the same whether it occurs in one step or a series of steps.

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.

Oil

Liquid triester of glycerol and unsaturated fatty acids.

Nuclear Reaction

Involves a change in the composition of a nucleus and can evolve or absorb an extraordinarily large amount of energy.

Coefficient of expansion

The ratio of the change in length or volumen of a body to the original lengthor volume for a unit change in temperature.