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Unit 5: Gases
3U Chemistry
Question | Answer |
---|---|
inversely proportional | as the independent variable increases, the dependent variable decreases |
bombarding | gases exert pressure on the sides of their container because they have high kinetic energy |
weak IMFs | gases are separated by a lot of space, so have weak intermolecular forces. All this space also makes gases highly compressible. |
Intermolecular forces | solids are separated by very small amount of space, so have strong intermolecular forces. |
Boyle's Law | Pressure and volume are inversely proportional . |
Charles' Law | Volume and temperature are proportional to each other. As KE increases, the particles take up more space! |
-273.15 K = Absolute Zero | The temperature at which a gas theoretically takes up zero volume. OR the temperature at which all molecular movement stops. |
Gay-Lussac's Law | Pressure and temperature are proportional to each other |
Avogadro’s Law | Moles of gas and volume of gas are proportional to each other |
STP | 101.325 kPa; 0 oC; 22.4 L per mole |
SATP | (room conditions): 100 kPa; 25 oC; 24.8 L per mole |
Ideal Gas Law | P and V are directly proportional to n, R and T as they are on opposite sides of the equation |
Dalton's Law | The total pressure exerted by a mixture is equal to the sum of the partial pressures each gas in the mixture (Ptotal=P1+P2+...) |
barometer | device that measures air pressure (in Canada, our weather reports include air pressure in kPA). |
Combined Gas Law | The combined gas law analyses pressure, temperature and volume when none are held constant |
solubility of gases | is inversely proportional to temperature. Cold water holds more dissolved gases because their KE is lower so they don't pop out of solution as readily. |