Pressure measures force per unit area, with SI units of pascals (1 Pa = 1 N/m2). As elevation increases, there is less overlying atmospheric mass, so that atmospheric pressure decreases with increasing elevation. In most circumstances atmospheric pressure is closely approximated by the hydrostatic pressure caused by the weight of air above the measurement point. Atmospheric pressure, atm Definition:ĭefinition of Atmospheric pressure, atm provided by WikiPedia:Ītmospheric pressure, sometimes also called barometric pressure, is the pressure within the atmosphere of Earth (or that of another planet). One millimeter of mercury is approximately 1 torr, which is 1/760 of standard atmospheric pressure (101325760 =133.322368421 pascals). Although not an SI unit, the millimeter of mercury is still routinely used in medicine, meteorology, aviation, and many other scientific fields. Millimeter of mercury, mmhg Definition:ĭefinition of Millimeter of mercury provided by wikipedia: Conversion formulas Kilopound per square inch , Pounds per square inch (ksi, psi): What volume will the gas occupy at 84.6 kPa? a. A gas occupies a volume of 2.4 L at 14.1 kPa. What is the calculated volume of the gas at 20.0☌ and 740 mm Hg? a. The volume of a gas collected when the temperature is 11.0☌ and the pressure is 710 mm Hg measures 14.8 mL. If the volume does not change, what is the pressure after the tire has warmed to 15☌? a.
On a cold winter morning when the temperature is -13☌, the air pressure in an automobile tire is 1.5 atm. At the same temperature, what is the pressure at which the volume of the gas is 2.0 L? a. The volume of a gas is 0.4 L when the pressure is 1.00 atm. What pressure do they exert if they are all placed in a single container? a. Three samples of gas each exert 740 mmHg of pressure in separate containers. Convert the pressure 2.50 atm to kPa (1 atm = 101.3 kPa) a.
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