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Pressure, Gas Laws, & The Ideal Gas Equation

  • Pressure is defined as Force per Area, and its SI unit is the Pascal
  • Ideal Gas Law: PV = nRT. This equation expresses a relationship among the various measureable quantities of a given gas sample. It might better be written as PV/nT = R.
  • In other words, given a sample of gas, its Pressure times the volume it occupies divided by the number of mols of gas times its Kelvin temperature is equal to a Constant.
  • When some mathematical arrangement of parameters is equal to a constant, this is profoundly important.
  • R is the Gas Constant: 0.08306 Liter-Atmosphere/Mol-Kelvin
  • Units used must match the units of R.
  • Standard Temperature and Pressure (STP) is 0 K and 1 atm.

Pressure, Gas Laws, & The Ideal Gas Equation

Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.

Advanced Placement Chemistry