Gases: Pressure and Manometers

Dr. Chu

River Dell Regional High School

Units of Pressure

1 Pascal (Pa) = 1 N/m2

1 atm = 760 mmHg = 760 torr

= 101,325 Pa = 101.325 kPa

= 14.7 psi

Barometer

Pressure = ForceArea

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]

Sea level 1 atm

4 miles 0.5 atm

10 miles 0.2 atm

MANOMETER – CLOSED

MANOMETER – OPEN (CASE 1)

MANOMETER – OPEN (CASE 2)

MANOMETER – OPEN (CASE 3)