Gas Variables.

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Presentation transcript:

Gas Variables

Pressure Force Pressure = Area Vacuum space void of all matter and therefore pressure Force Area Pressure = Units 1 pascal (Pa) = 1 N/m2 1 atm = 760 mmHg = 760 torr = 101.3 kPa Barometer is an instrument used for measuring atmospheric pressure.

Atmospheric pressure is the pressure exerted by Earth’s atmosphere. 10 miles 0.2 atm Depends on location, temperature, and weather conditions 4 miles 0.5 atm Sea level 1 atm

Dimensional Analysis Convert 2.5 atm into torr, mmHg and kPa

Temperature Absolute zero is the lowest temperature theoretically possible; point at which there is no molecular motion. K = °C + 273

Amount of space an object or substance takes up (3D) Volume Amount of space an object or substance takes up (3D)

Avogadro’s Law V  number of moles (n) 1 mol of gas at STP = 22.4L Constant temperature Constant pressure 1 mol of gas at STP = 22.4L

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