States of matter

Question 0

What’s Kinetic theory?

Answer 0

All matter consists of tiny particles that are in constant motion.

Question 1

What’s Kinetic energy?

Answer 1

An energy object contains because of it’s motion.

Question 2

Three assumptions of the kinetic theory as it applies to gases?

Answer 2

Particles in gas considered to be small, hard spheres with insignificant volume.

Motion of the particles are rapid, constant, and random.

All collisions between particles in gas are elastic.

Question 3

What’s Gas pressure?

Answer 3

Results from the force exerted by a gas per unit surface area of an object.

Question 4

How does kinetic theory explain gas pressure?

Answer 4

Result of billions of rapidly moving particles in a gas simultaneously colliding with an object.

Question 5

What’s Vacuum?

Answer 5

Empty space with no particle one no pressure.

Question 6

What’s Atmospheric pressure?

Answer 6

Collisions of atoms and molecules in air with object.

It decreases as the elevation increases.

Question 7

What’s Barometer?

Answer 7

Device used to measure atmospheric pressure.

Question 8

What’s Pascal?

Answer 8

Represents small amount of pressure.

Question 9

Relationship between the temperature in kelvin and the averaged kinetic energy of particle?

Answer 9

Kelvin temp of a substance is directly proportional to the average kinetic energy or the particles of the substance.

Question 10

What factors determine the physical properties of a liquid?

Answer 10

The interplay between the disruptive motions of particles Ina liquid and the attractions among the particles determines the physical properties of a liquid.

Question 11

What’s Vaporization?

Answer 11

Conversion of a liquid to gas or vapor.

Question 12

What’s Evaporation?

Answer 12

When this conversion occurs at the surface of a liquid that is not boiling.

Question 13

What’s the relationship between evaporation and kinetic energy?

Answer 13

During evaporation only those molecules with certain minimum kinetic energy can escape from the surface of a liquid.

Question 14

What’s Vapor pressure?

Answer 14

Measure of the force exerted by gas above a liquid.

Question 15

When can dynamic equilibrium exist between liquid and it’s vapor?

Answer 15

The rate of evaporation of liquid equals the rate of condensation of vapor.

Question 16

Under what conditions does boiling occur?

Answer 16

When liquid is heated to a temperature at which particles throughout a liquid have enough kinetic energy to vaporize, liquid begins to boil.

Question 17

What’s Boiling point?

Answer 17

Temperature which the vapor pressure of the liquid is equal to external pressure of the liquid.

Question 18

What’s Normal boiling point?

Answer 18

Defined as the boiling point if a liquid at a pressure of 101.3 kPa

Question 19

What’s Melting point?

Answer 19

Temperature at which solid changes into liquid.

Question 20

What’s Freezing point?

Answer 20

Temperature at which liquid changes into solid.

Question 21

What’s Crystal?

Answer 21

Particles arranged orderly, repeating three dimensional pattern called crystal lattice.

Question 22

What determined the shape of a crystal?

Answer 22

It reflects the arrangement if the particles within a solid.

Question 23

What’s Unit cell?

Answer 23

Smallest group of particles within a crystal tags retains the geometric shape of a crystal.

Question 24

What’s Sublimation?

Answer 24

The change from solid to a vapor without passing through the liquid state.

Question 25

When can sublimation occur?

Answer 25

In solid with vapor pressures that excess atmospheric pressure at or near room temperature.

Question 26

What’s Phase diagram?

Answer 26

Gives conditions of temperature and pressure at which substance exists as solid liquid or gas.

Question 27

What’s Triple point?

Answer 27

Describes the only set of conditions at which all three phases can exist in equilibrium with one another.

Question 28

How do chemists use balances chemical equations?

Answer 28

Calculate how much reactant is needed or how much prosecutor will be formed in a reaction.

Question 29

Stoichiometry?

Answer 29

The calculation of quantities in chemical reaction is a subject of chemistry