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level: Gas Laws and the Kinetic Model

Questions and Answers List

level questions: Gas Laws and the Kinetic Model

QuestionAnswer
What is meant by pressure?force per unit area in pascals or nm-2
what is the formula for pressurep=f/a
what is one pascal the same as1 nm-2
what is boyles lawdescribes 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 experimentcollect 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 experimentif 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 modelwhen 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 experimentcollect 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 experimentif 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 experimentif 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 zero0 Kelvin or -273 degrees celcius
how do you convert from celcius to kelvinadd 273
how do you convert from kelvin to celciustakeaway 273
what is the equation for gay lussacs lawp1/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 lawstates that as the volume of gas inside a container increases the temperature inside the container increases
what is the equation for charles lawV1/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 experimentcollect 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 experimentif 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 experimentif 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