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Gas
Characteristics of Gas
| Question | Answer |
|---|---|
| vapors | the elements (that are usually solid or liquid) that exist in the gaseous state |
| What does the volume of gas equal? | volume of gas equals volume of its container |
| What happens when gases are mix together | gases form homogenous mixtures with each other regardless of the identities or properties of the component gases |
| What are the measured properties of a gas? | temperature, volume, pressure |
| Pressure = ? | Force/Area |
| Force = ? | mass * acceleration |
| gravity exerts an acceleration of ? | 9.8 m/s^2 |
| 1 Newton =? | kg*m/s^2 |
| What is the SI unit of pressure? | Nm^ -2 (called a pascal (Pa) ) |
| 1 Pa (pascal) = ? | 1 N (newton)/m^2 |
| The atmospheric pressure at sea level is about | 100 k Pa |
| barometer | measures atmospheric pressure |
| atmospheric pressure =? | 1.01325 * 10^5 Pa |
| Other units of pressure: | 1atm = 760mmHg = 760torr = 1.01325 * 10^5 Pa = 101.325 kPa |
| 1 torr = ? | 1 mm Hg |
| manometer | (contains mercury) used to measure the pressure of an enclosed gas. |
| Gas laws | equations that tells the relationship among P, T, V, and n |
| Pressure -Volume Relationship: Boyle's Law | Volume of gas is inversely proportional to the pressure (as pressure decrease, volume increase, and vice versa) |
| PV = ? | constant (the value of the constant depends on the T and the amount of gas in the sample) |
| Temperature - Volume | (blank) |
| 0 degree K =? | -273.15 C |
| Volume/Temp. =? | constant (value of constant depends on the pressure and amount of gas) |
| The Quantity - Volume Relationship: Avogadro's Law | volume of gas is proportional to the # of moles of the gas |
| Law of Combining Volumes (discovered by Lussac) | (blank) |
| 1 mole of any gas (6.02 * 10^23 gas molecules) at atm. pressure and 0 degree C occupies (blank) liter volume | 22.4 |
| V = ? | constant * n |