CHEM 12- Midterm Exam Guide - Comprehensive Notes for the exam ( 31 pages long!)
16 Feb 2018
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Gases: one of the fundamental states of matter, atmosphere mixture of gases, important for life. Important in chemistry reactions consume or produce gases. Pressure: all gases exert pressure, pressure is from collisions of gas molecules with the container walls or other surfaces, pressure = force applied/area, units, 1 atm = 760 mm hg (exactly, 1 atm = 105 pa. Manometer to measure the gas pressure: manometers compare outside pressure to inside pressure, example: The gas laws: charles" law: volume of gas (at constant p) is proportional to absolute temperature, temperature with kelvin scale: k = 0 degrees c + 273. 15. The gas laws: boyle"s and avogadro"s law: boyle"s law: inverse relationship between volume and pressure, avogadro"s law: volume of gas (at constant p and t) is directly proportional to number of moles of gas) Ideal gas law: combine boyle, charles, and avogadro"s laws, pv = nrt, r = 0. 08206 l*atm/mol*k, temperature must be in kelvins, example:
