Chem

Front 1

Three components of Kinetic Theory

Back 1

1.) All substances are composed of small particles (atoms, ions, molecules).
2.) All collisions are elastic
-->No energy is lost
-->No friction
3.) All particles are in constant motion

Front 2

Perfect elastic collision?

Back 2

There is no change in the total kinetic energy of two particles before and after their collision.

Front 3

What is the relationship between Kinetic Energy and Temperature?

Back 3

If you increase the temperature, the kinetic energy of the molecules increases as well.

Front 4

Convert Celsius to Kelvin

Back 4

temp kelvin= temp Celsius + 273.15

Front 5

Convert Kelvin to Celsius

Back 5

T(c)= T(k)-273.15

Front 6

Kentic Energy Formula

Back 6

KE=(1/2)*m*v^2

Front 7

Solid at Atomic Level

Back 7

The particles (ions, atoms or molecules) are packed closely together. The forces between particles are strong enough so that the particles cannot move freely but can only vibrate. As a result, a solid has a stable, definite shape, and a definite volume.

Front 8

Liquid at Atomic Level

Back 8

able to conform to the shape of its container but retains a (nearly) constant volume independent of pressure. The volume is definite if the temperature and pressure are constant.

Front 9

Gas at Atomic Level

Back 9

Gas particles travel in a random manner, fills shape of entire container.

Front 10

Boiling Point Definition

Back 10

The temperature (average K.E. of liquid at which the temperature becomes large enough to overcome all of the internal atomic pressure of the liquid.

Front 11

Melting Point

Back 11

The temperature at which (average KE) the vapor pressures of the solid an liquid phases of a substance are equal

Front 12

Critical Temp

Back 12

The temp of a specific gas above which no amount of pressure will result in liquefying the gas.

Front 13

Critical Pressure

Back 13

The pressure needed to liquify a specific gas at its critical temp.

Front 14

Importance of Critical Temp

Back 14

Critical Temp tells us about the relative strength of the attractive forces between molecules

Front 15

As Critical Temp (Tc) increases -->

Back 15

Stronger attractive forces

Front 16

As Critical Temp (Tc) decreases -->

Back 16

Weaker attractive forces

Front 17

Difference between evaporation and boiling?

Back 17

Evaporation occurs at temperatues lower than the boiling point of the liquid. Also, evaporaiton occurs at the surface of the liquid, whereas in boiling, bubbles of vapor arise inside the body of the liquid.

Front 18

Liquefaction

Back 18

Condensation of a substance that is normally a gas at room temp. Requires a drop in temp and a rise in pressure to allow Van der Waals forces to overcome KE.

Front 19

Enthalpy of fusion triangle Hfus

Back 19

The energy required to melt one gram of a substance at its melting poing.

Front 20

Enthalpy of Vaporization triangle Hvapor

Back 20

The amount of energy required to vaporize one gram of a specific substance at its boiling point.