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Flashcards in Vocab Words Deck (24):
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Heats of solution

Heat absorbed when 1 mole of a solute is dissolved in a definite quantity of a pure solvent.

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Graph

Visual representation illustrating how one variable changes with another variable , or it is a to used to illustrate the relationship between two variables.

2

Parallel lines

Two straight lines if they have identical slopes.

3

Gas molecules

Held together by intermolecular forces, no regular shape, rapid motion, posses KE.

4

Boiling point

Temperature at which vapor pressure of a liquid equals the atmospheric pressure.

5

Later heat of vaporization

Heat absorbed when a liquid vaporizes at normal boiling point.

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Latent heat of fusion

Heat absorbed when a liquid vaporizes at normal boiling point

7

Heat of fusion

Heat required to increase the inter atomic or intermolecular distances in the crystal allowing melting.

8

Equilibrium of saturation solubility.

Maximum amount of a solute or drug that is present in the solution form per unit volume of a solvent at a constant temp and pressure.

9

Equilibrium condition

When the rate of transfer of a solid in to the solvent and a rate deposition of a solute molecule from the solvent on to the solid crystal become equal.

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Solubility

Maximum among of a solute present in a solution form per unit volume of a solvent at constant temp and pressure following the attainment of equilibrium constant.

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Dynamic equilibrium

Rate of vaporization and rate of condensation become equal at a definite temperate, become saturated,

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Equilibrium vapor pressure

Pressure of saturated vapor above liquid.

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Solubility of a substance

Quantity that will dissolve in a specified quantity of solvent to form a saturated solution at given temperature.

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Saturated solution

Drug molecules in a solution are in equilibrium w/ excess of solute in a solution.

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Supersaturated solution

Solution containing more of the dissolved solute than it would normally contain at a definite temperature.

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Molarity of molar solution

Moles of a solute present in 1000 grams of solvent.

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Mole fraction

Ratio of moles of one constituent of a solution to tot moles of all other constituents.

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Normality at normal solution

Gram equivalent weight of a solute in 1 liter of solution.

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Molarity of molal solution

Moles of solute present in 1000 grams of solvent.

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Polymorphism

Substance crystallizing in more than one crystal form.

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Enantiotropic

Changing from one polymorph to another is reversible by varying temperature or pressure.

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Monotropic

Changing from one form to another In the same direction.

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Metastable

High energy form polymorph w ⬇️mp and ⬆️Solubility.... Most desirable form.