| What is meant by pressure? | force per unit area in pascals or nm-2 |
| what is the formula for pressure | p=f/a |
| what is one pascal the same as | 1 nm-2 |
| what is boyles law | describes the relationship between the volume and pressure of gas inside a container when temperature and mass of gas is constant
It states the pressure of gas inside a container increases as the volume of the contianer decreases.. |
| describe the boyles law experiment | collect a pressure sensor, syringe and short tubing. Move the piston of the syringe and record the readings of pressure on the pressure sensor for each value of volume on the syringe. |
| describe the results of the boyles law experiment | if a graph is plotted of pressure against 1/volume we can see that pressure is inversely proportional to volume |
| what are some possible sources of error in the boyles law experiment? | reading errors
gas heating from handling syringe so temp is no longer constant
incorrect volume due to volume in short tubing |
| what is the equation for boyle's law experiment? | p1V1=p2V2
where p1+p2 are initial & final pressures
V1 and V2 are initial and final volumes |
| describe boyle's law in terms of the kinetic model | when the container of a fixed mass of gas at a constant temperature is compressed, the volume of gas decreases so the particles have less space to move around in. Therefore they collide with the walls of container more often and exrt more force per unit area, and so pressure increases. |
| what is gay-lussacs law? | states that the pressure of a fixed mass and volume of gas is directly proportional to the gases absolute temperature |
| describe the gay lussacs law experiment | collect an air-filled flask, thermometer, pressure gauge and a beaker of boiling water.
set up equipment with a thermometer in a beaker and the air-filled flask inside the beaker, attached to the pressure gauge.
carefully heat up the water to boiling and as it slowly heats, record the temperature and pressure at five different temperatures. |
| what is the result of the gay lussacs law experiment | if you draw a graph of pressure against temperature in kelvin, you will see that temperature and pressure are directly proportional, and your graph is a straight line through the origin (0K) |
| what are some possible sources of error in the gay lussacs law experiment | if flask isn't submerged the air can be a different temperature to the water
if connection is too long the glass can cool or heat compared to the gas in the flask
are the temperature of the water and the glass the same?
reading error on the pressure gauge or thermometer |
| What is absolute zero | 0 Kelvin or -273 degrees celcius |
| how do you convert from celcius to kelvin | add 273 |
| how do you convert from kelvin to celcius | takeaway 273 |
| what is the equation for gay lussacs law | p1/T1 = p2/T2
where p1 and p2 are initial and final pressures of gas
T1 and T2 are initial and final temperatures of gas |
| what is charles law | states that as the volume of gas inside a container increases the temperature inside the container increases |
| what is the equation for charles law | V1/T1=V2/T2
where V1 and V2 are initial and final volume of gas
T1 and T2 are initial and final temperature of gas in Kelvin |
| describe the Charles law experiment | collect a thermometer, a beaker of water, a capillary tube (with an oil plug to create an air bubble) and a scale.
Set up the experiment with the thermometer, scale, and capillary tube inside the beaker of water
Heat the water to boiling, and as it heats record the temperature and length of the trapped air column with the scale.
Remove from heat and allow apparatus to cool, as the air column cools obtain a set of corresponding values of temperature and length of the trapped air column |
| what are the results of the charles law experiment | if you draw a graph of volume against temperature in kelvin you will get a straight line through absolute 0, as volume is directly proportional to temperature. |
| what are some possible sources of error with the charles law experiment | if capillary tube is not completely submerged, the air can be at a different temperature to the water
reading error of the thermometer and the scales |
| what is the general gas equation? | p1V1/T1 = p2V2/T2 |
