Particles in Action Edexcel (part one)

What is the lower limit to the Degrees Celcius temperature scale?

The lower limit of the Degrees Celcius temperature scale is -273`C.

At this temperature movement and vibrations are at a minimum, the temperature cannot fall any further-this is absolute zero.

True or False?

The Kelvin temperature scale has NO minus values.

TRUE

The Kelvin temperature scale is based o absolute zero-where the scale begins.

What is 400K in Degrees Celcius?

400K to `C is 127`C

Degrees Celcius = 400 - 273 = 273`C

Equations you need to know:

`C = K - 273

 k = `C + 273

What is the value that pressure within a container is messured in?

Pressure within a container is measure in Pascals.

Give two effects of a raise in temperature on a gas ...

You could have given any two ou of these:

* Gas molecules move faster

*Collisions become more intense

*The force on the container walls increases

*The pressure within the container increases

Give the two main effects of a decrease in temperature on a gas...

You could have named any two out of these:

*The gas molecules move more slowly

*The pressure falls within teh container

*The molecules begin to form into a liquid

 True or False

The temperature in Degrees Celcius is dircetly proportional to the average kinetic energy of moving molecules.

FALSE

The temperaure in Kelvin (not Degrees Celcius) is directly proportional to teh average kinetic energy of the moving molecules.

Equation you need to know:

T is directly proportional to 1/2mv(squared)

t is temperature

m is the mass of the molecule

v is the average speed of teh gas molecule

Match the Unit to its equivilant in Pascals (Pa)

Units

Bar (bar)....Milibar (mbar)....atmosphere(atm)....Pound/in (psi)....millimetres of mercury(mmHg)

Equivilant in pascals

100....101.3...133.3....1x10(power of 5)....6895

Bar = 1x10(power of 5)

Mbar = 100

atm = 101.3

psi = 6895

mmHg = 133.3

Gas volumes are given in m(cubed) or cm(cubed), what are the imperial units that they can also be measured in?

Gas volumes can be measured in cubic feet and cubic inches aswell as metres cubed and centemetres cubed.

What is the quation used to express the pressure law?

Pressure = Constant x Temperature