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Energy of motion

Kinetic energy

1

Explains the behavior of particles in terms of their motions

Kinetic theory

2

4 properties of gases:

1-negligible volume
2-move in rapid, constant straight-line motion
3-Collide elastically
4-far apart with no attractive or repulsive force

3

Collision in which no kinetic energy is lost.

Elastic collision

4

Measure of average kinetic energy

Temperature

5

The _____________ the temperature, the _____ moving particles.

Higher
Faster

6

Temperature at which the motion of the particles theoretically ceases.

Absolute zero

7

Simultaneous collisions of billions of molecules within an object

Pressure

8

Force is created by _____.

Collisions

9

Pressure=?

Force
________
Area

10

Empty space, no collisions

Vacuum

11

Air molecule collisions

Atmospheric pressure

12

Typical sea level pressure

ATM

13

Barometric reading

mm Hg

14

Forces within a compound that hold it together

Intramolecular forces

15

Forces between compounds that hold these compounds together.

Intermolecular forces

16

Which two phases are fluid?

Liquids and gases

17

Why are liquids more dense than gases?

Because they have attractive forces

18

Temperature that a solid turns into a liquid

Melting point

19

The stronger the intermolecular force the _______ the melting point

Higher

20

Temperature at which a solid melts at 1.00 ATM atmosphere(101.3kPa) of pressure.

Normal melting point

21

Process of a liquid changing to a gas or vapor

Vaporization

22

Liquid to gas below boiling point
Happens only on the surface

Evaporation

23

How many particles escape during evaporation to become a gas

Only particles moving fast enough

24

As high speed particles escape this lowers the average kinetic energy and therefore the temperature.

Cooling process

25

Increasing temperature will _______ vapor pressure

Increase

26

The temperature at which the vapor pressure of a liquid is equal to the external pressure on a liquid.

Boiling point

27

Temperature when the vapor pressure equals the atmospheric pressure 1 atm=101.3kPa.

Normal boiling point.

28

Temperature of liquid _____ gets above the boiling point

Never

29

Three properties of solids:

1- tightly packed
2-do not flow(they vibrate)
3-incompressible