# Particles in Action Edexcel (part one)

Revision Cards that coverthe topic Particles in Action, on the Edexcel P3 Physics specification.

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## Temperature

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

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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.

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## Temperature

True or False?

The Kelvin temperature scale has NO minus values.

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TRUE

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

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## Temperature

What is 400K in Degrees Celcius?

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400K to `C is 127`C

Degrees Celcius = 400 - 273 = 273`C

Equations you need to know:

`C = K - 273

k = `C + 273

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## Pressure

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

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Pressure within a container is measure in Pascals.

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## Temperature

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

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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

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## Temperature

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

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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

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## Temperature and Energy

True or False

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

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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

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## Measuring Gases

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

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Bar = 1x10(power of 5)

Mbar = 100

atm = 101.3

psi = 6895

mmHg = 133.3

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## Gas Volumes

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

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

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## Gas Laws

What is the quation used to express the pressure law?

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Pressure = Constant x Temperature

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Report

The book says it's measured in atm? Whatever that is :'D but is it atm or pascals? <3

Report

page 20of20: can that be switched around? for example:

could it be volume=constant(temp)xpressure

i know this will be confusing - i really can't get my head round all this

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