Gases: Pressure and Manometers Dr. Chu River Dell Regional High School

Force Pressure = Area Units of Pressure 1 Pascal (Pa) = 1 N/m2 Barometer Pressure = Units of Pressure 1 Pascal (Pa) = 1 N/m2 1 atm = 760 mmHg = 760 torr = 101,325 Pa = 101.325 kPa = 14.7 psi

Pressure – examples Convert from 123,560 Pa to atm Convert 45.7 psi to mmHg

Pressure – exercise Convert 1.5 atm to mmHg Convert 768 mmHg to kPa Convert 235,620 Pa to psi Convert 0.23 psi to torr

Pressure – exercise Answers Convert 1.5 atm to mmHg [1140 mmHg] Convert 768 mmHg to kPa [102.4 kPa] Convert 235,620 Pa to psi [34.2 psi] Convert 0.23 psi to torr [11.9 torr]

10 miles 0.2 atm 4 miles 0.5 atm Sea level 1 atm

Manometer – Closed

Manometer – Open (case 1)

Manometer – Open (Case 2)

Manometer – Open (Case 3)