Page 456 - Chemistry--atom first
P. 456
446 Chapter 8 | Gases
pascal (Pa) SI unit of pressure; 1 Pa = 1 N/m2
pounds per square inch (psi) unit of pressure common in the US
pressure force exerted per unit area
rate of diffusion amount of gas diffusing through a given area over a given time
root mean square velocity (urms) measure of average velocity for a group of particles calculated as the square root of the average squared velocity
standard conditions of temperature and pressure (STP) 273.15 K (0 °C) and 1 atm (101.325 kPa) standard molar volume volume of 1 mole of gas at STP, approximately 22.4 L for gases behaving ideally
torr unit of pressure;
van der Waals equation modified version of the ideal gas equation containing additional terms to account for non- ideal gas behavior
vapor pressure of water pressure exerted by water vapor in equilibrium with liquid water in a closed container at a specific temperature
Key Equations
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p=hρg
PV=nRT
PTotal = PA + PB + PC + ... = ƩiPi PA = XA PTotal
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