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unit 8
gases
| Term | Definition |
|---|---|
| Pressure | continuous physical force exerted on or against an object by something in contact with it. |
| Newton | the SI unit of force. It is equal to the force that would give a mass of one kilogram an acceleration of one meter per second per second, and is equivalent to 100,000 dynes. |
| Barometer | an instrument measuring atmospheric pressure, used especially in forecasting the weather and determining altitude. |
| Millimeters of Mercury | a manometric unit of pressure, formerly defined as the extra pressure generated by a column of mercury one millimetre high, and currently defined as exactly 133.322387415 pascals. |
| Atmosphere of Pressure | the pressure within the atmosphere of Earth. |
| Pascal | the unit of pressure or stress in the International System of Units (SI). |
| Partial Pressure | the pressure that would be exerted by one of the gases in a mixture if it occupied the same volume on its own. |
| Dalton's law of partial pressure | that the total pressure of a mixture of gases is equal to the sum of the partial pressures of the component gases |
| Boyles Law | Boyle's law states that the volume of a fixed mass of gas varies inversely with the pressure at constant temperature P1V1 = P2V2 |
| Absolute Zero | the lowest temperature that is theoretically possible, at which the motion of particles that constitutes heat would be minimal. |
| Charle's law | a statement that the volume occupied by a fixed amount of gas is directly proportional to its absolute temperature |
| Gay-Lussac's law | a law stating that the volumes of gases undergoing a reaction at constant pressure and temperature are in a simple ratio to each other and to that of the product. |
| Combined gas law | expresses the relationship between the pressure, volume, and absolute temperature of a fixed amount of gas |
| Avogadro's law | a law stating that equal volumes of gases at the same temperature and pressure contain equal numbers of molecules |
| Standard molar volume of a gas | the volume of one mole of a gas at STP |
| ideal gas law | relation between the pressure P, volume V, and temperature T of a gas in the limit of low |
| ideal gas constant | the proportionality constant in the ideal gas equation |
| Graham's law of effusion | the ratio of the rates of diffusion or effusion of two gases is the square root of the inverse ratio of their molar masses |