CHEM (DEF OF TERMS)

Question 1

This is a homogenous part of the system in contact with other parts of the system but separated from them by a well-defined boundary.

Answer 1

Phase

Question 2

Solid to liquid?

Answer 2

Melting

Question 3

Liquid to solid?

Answer 3

Freezing

Question 4

Liquid to gas?

Answer 4

Evaporation

Question 5

Gas to liquid?

Answer 5

Condensation

Question 6

Solid to gas?

Answer 6

Sublimation

Question 7

Gas to solid?

Answer 7

Deposition

Question 8

Enumerate the kinds of intermolecular forces based on strength.

Answer 8

1. Ion-dipole
2. Hydrogen bond
3. Dipole-dipole
4. London dispersion

Question 9

This is an IMF (Intermolecular Force) between an ion an a polar molecule.

Answer 9

Ion-dipole

Question 10

This is an IMF between H and either the elements N, O, or F.

Answer 10

Hydrogen bond

Question 11

This is an IMF between polar molecules.

Answer 11

Dipole-dipole

Question 12

This an IMF that arises as a results of temporary dipoles induced in atoms or molecules.

Answer 12

Dispersion forces

Question 13

This is the case with which the electron distribution in the atom or molecule can be distorted.

Answer 13

Polarizability

Question 14

A property of liquid that requires a certain amount of energy to stretch or increase surface of a liquid by a unit area.

Answer 14

Surface Tension

Question 15

A property of liquid that is the intermolecular attraction between LIKE molecules.

Answer 15

Cohesion

Question 16

A property of liquid that is the attraction between UNLIKE molecules.

Answer 16

Adhesion

Question 17

A property of liquid that is the measure of a fluid’s resistance to flow.

Answer 17

Viscocity

Question 18

A property of solid that is rigid and has a long-range order where atoms, molecules, or ion occupy specific predictable positions.

Answer 18

Crystalline Solid

Question 19

A property of solid that doesn’t possess a well-defined arrangement and long-range molecular order.

Answer 19

Amorphous Solid

Question 20

The basic repeating structural unit of a crystallin solid.

Answer 20

Unit Cell

Question 21

A kind of crystal that is held together by electrostatic attraction.

Answer 21

Ionic crystals

Question 22

A kind of crystal that is held together by covalent bonds.

Answer 22

Covalent crystals

Question 23

A kind of crystal that is held together by intermolecular forces,

Answer 23

Molecular crystals

Question 24

A kind of crystal that is held together by metallic bonds.

Answer 24

Metallic crystals

Question 25

This is a combination of two or more components that are not chemically combined and retained their identities. Can be physically separated.

Answer 25

Mixture

Question 26

A kind of mixture that has component particles that cant be distinguised. A solution.

Answer 26

Homogenous

Question 27

A kind of mixture that has easily recognisable components.

Answer 27

Heterogenous

Question 28

A common technique that separates a mixture based on the boiling points of the components.

Answer 28

Distillation

Question 29

A common technique that separates iron from other objects.

Answer 29

Magnets

Question 30

A common technique that separates a mixture according to centrifuge.

Answer 30

Centrifuge

Question 31

A mixture that appears to be a single substance but has two or more substances that are evenlu distributed amongst each other.

Answer 31

Solution

Question 32

The part of a solution being dissolved.

Answer 32

Solute

Question 33

The part of the solution that dissolves the solute.

Answer 33

Solvent

Question 34

A process in which particles of substances separate and spread evenly amongs each other.

Answer 34

Dissolving

Question 35

A classification of solution that contains the maximum quantity of solute that dissolves at a temperature.

Answer 35

Saturated

Question 36

A classification of solution that contains more solute than is possible to dissolved.

Answer 36

Unsaturated

Question 37

This is the amount of solute needed to make a saturated solution using a given amount of solvent at a certain temperature.

Answer 37

Solubility

Question 38

Methods affecting solubility? | Hint: M.H.C.

Answer 38

1. Mixing 2. Heating 3. Crushing

Question 39

This is a mixture in which particles of a material are dispersed throughout a liquid or gas but are large enough that they settle out.

Answer 39

Suspension

Question 40

This is a mixture in which particles of a material are dispersed throughout a liquid or gas but are not large enough to settle..

Answer 40

Colloids

Question 41

A light scattering by particles in a colloid or else particles in a very fine suspension.

Answer 41

Tyndall Effect

Question 42

List the colligative properties. | Hint: V.B.M.O.

Answer 42

1. Vapor Pressure 2. Boiling Point 3. Melting Point 4. Osmotic Pressure

Question 43

A colligative property that is defined as the pressure exerted by a vapor in thermodynamic equilibrium with its condensed phases at a given temperature in a closed system.

Answer 43

Vapor Pressure

Question 44

A colligative property that is a phenomenon that the boiling point of a liquid will be higher when another compound is added, meaning that a solution has a higher boiling point than a pure solvent.

Answer 44

Boiling Point

Question 45

A colligative property that is a phenomenon of reduction of the melting point of a material with reduction of its size.

Answer 45

Melting Point

Question 46

A colligative property that is the minimum pressure which needs to be applied to a solution to prevent the inward flow of water across a semipermeable membrane.

Answer 46

Osmotic Pressure