calculations+including+those+involving+gas+laws


 * //Calculations including those involving gas laws// **


 * Videos**

Measuring gas pressure || media type="custom" key="24299292" Boyle's law || media type="custom" key="24299406" Charles' Law ||
 * media type="custom" key="24278250"

Molar volume of gas at STP || media type="custom" key="24300064" Combined Gas Law || media type="custom" key="24300154" Ideal Gas Law explained ||
 * media type="custom" key="24299472"

Ideal Gas Law example || media type="custom" key="24299444" Which equation do I use? ||
 * media type="custom" key="24300176"


 * Common misconceptions:**
 * You can use the ideal gas law for a substance that is not in the gaseous state.
 * Pressure does not need to be constant when using Charles' law.
 * The ideal gas law explains how a gas will behave.
 * You don't need to distinguish between and elastic container (like a balloon) and a non-elastic container (like a SCUBA tank) when using gas laws.
 * Pressure and volume share a direct relationship in Boyle's law.


 * Interesting facts:**
 * There are several units to describe pressure, 1.000 atm = 760 mmHg = 1.013 x 10 5 Pa = 101.3 kPa = 1.01 bar.
 * The kelvin temperature scale is named after William Thompson, also known as Lord Kelvin, a Scottish physicist/mathematician.
 * At a given temperature and pressure, the volume of a gas is proportional to its absolute temperature in kelvin, provided the pressure is kept constant.
 * Ideal gas laws are only applicable to gases.
 * The total pressure of a mixture of gases is the sum of the individual pressures (partial pressures) of the individual gases in the mixture.
 * The ideal gas law describes how the pressure, volume, and temperature of a particular amount of gas are related to one another. It does not describe how gases //must// behave; we know that gases do not precisely conform to the ideal gas law.
 * It's important to explain what type of container is being used when looking at gas laws. For example, Boyle’s law is best described using non-elastic containers as an example. The law says as volume decreases, as when a piston is pushed down, the contained gas has more collisions with the wall of the container so pressure increases. Or if one transfers a given amount of a gas from a small scuba tank to a larger scuba tank, the pressure is less in the large scuba tank due to an increase in volume. If looking at a balloon, when one adds gas to a balloon, the balloon expands (volume increases) due to an increase in the number of collisions (pressure) between the contained gas and the inner walls of the balloon. This may confuse people to think that pressure and volume have a direct relationship, but in Boyle's law, their relationship is inverse.


 * Resources:**
 * Gas Laws from Awesome Science Teacher Resources.
 * Gas properties simulation from PhET.
 * Ideal Gas Equation from tesconnect.