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Properties of gases (BOYLES LAW (As pressure is increased the volume…
Properties of gases
BOYLES LAW
- As pressure is increased the volume decreses
- States that at a constant temperature the volume of a fixed mass of gas is inversely proportional to its pressure
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- When volume of container is decreased the molecules are now moving within a smaller space and collide more frequently with each other and the container
- Gas is made up of molecules which are cotinuously in motion
- Increased number of collisions causes an increase in pressure
PRESSURE
- Force the gas exerts on a unit area of its container
- Pressure is measured in newtons per metre squared
which is aslo called the pascal
- Normal atmospheric pressure is 100000 pascals
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CHARLES LAW
- Investigated the relationship between the volume and the temperature of a fixed mass of gas at constant pressure
- States that at constant pressure the volume of a fixed mass of gas is directly proportional to its temperature measured on the kelvin scale
- When temperature of container is increased molecules move more quickly due to increased kinetic energy
- Collide more frequently. In order to prevent an increase in pressure it is necessary for volume to increase
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PROPERTIES
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- Diffuse at different rates depending on size of particle
- Volume of gas is=volume of container
Gases can be either compressed or allowed to expand.
The volume of a sample of gas depends on temperature and pressure
TEMPERATURE
- Measure of the degree of hotness
- Measured in celcius or kelvin
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VOLUME
- Volume of a sample of gas is the same as the volume of the container in which the sample is held
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COMBINED GAS LAW
- Derived from charles law
so temp must be in kelvin
- Units on both side of equation
must be equal
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GAS
- Substance that has no well-defined boundaries but diffuses rapidly to fill any container in which it is placed
