Liquids By Jason, Dean, Noami, Katy, Gaby, Erika, and Claire

1
LiquidsBy Jason, Dean, Noami, Katy, Gaby,
Erika, and Claire
2
Question

• What is so special about liquids, and what kind
  of kinetic energy do liquids have?

3

• What forces hold particles together to form a
  liquid?
• What keeps liquids from changing into a solid or
  a gas?

4

• What are the properties of liquids?
• THIS IS WHAT WE WILL FIND OUT!!

5
Vaporization

• The conversion of a liquid to a gas.

6
Evaporation

• When vaporization happens at the surface on a
  liquid that isnt boiling. Some molecules in the
  liquid break away and enter the gas or vapor
  state.

7
(No Transcript)
8
Vapor Pressure

• When liquid is in a sealed container some of the
  particles vaporize and bounce off the container.
  Or the force of the gas above the water.

9
(No Transcript)
10
Boiling Point

• The temperature at which the vapor pressure of
  liquid is just equal to the atmospheric pressure.

11
The Boiling Point Video

• There are many kinds of boiling here is boiling
  at 60 degrees Celsius and more.

12
Normal Boiling Point

• The boiling point of a liquid at a pressure of
  101.3 kPa. Or STP. There are other ways to
  measure such as psi,in of Hg, mm Hg, torr and
  also 1atm.They all mean the same thing.

13
Evaporation

• Liquid converts into gas of vapor which is
  vaporization.
• When this occurs with a liquid that isnt boiling
  this process is evaporation.

14
Evaporation

• Molecules in the liquid break away and enter the
  gas or vapor state only the ones with enough
  kinetic energy.
• Evaporation is cooling process

15
Boiling point

• Heating allows larger numbers of particles at the
  liquids surface to overcome the attractive
  forces keeping them in the liquid state.

16
Boiling Point

• Boiling point is the temperature at which the
  vapor pressure of the liquid is just equal to the
  external pressure.
• Boiling is a process similar to evaporation.

17
A Model For Liquids

• - Particles in liquids are free to go past one
  another.
• - Unlike gases, liquid particles attract to each
  other rather than separate.
• - These attractive forces are called
  intermolecular forces.

18
A Model For Liquids

• - Molecules vibrate to keep the Kinetic energy
  moving.- However, they need much more energy to
  undergo a gaseous state.

19
A Model For Liquids

• - - Therefore solids and liquids are very similar
  because no matter the pressure that is put on
  their volumes, it will not change the volume.
  Solids and liquids are called condensed states of
  matter.

20
Water molecules evaporating
21
The cycle of evaporation
22
Video and Quiz
23
Questions

• When temperature is lowered how do molecules
  react?
• What is needed for molecules to start moving fast
  again?
• At what temperature does ice vaporize?
• How do the molecules react when vaporizing?
• In a sealed container what is the gas above the
  water called?

24
Slideshow Quiz

• What is the difference between evaporation and
  vaporization?
• What happens when liquid is in a sealed
  container?
• What happens when water reaches boiling point?
• What is the difference between gas and liquid
  particles?
• Why do molecules vibrate?