5.2 Gas Pressure and Its Measurement

Question 1

Pressure (P)

Answer 1

as the force exerted per unit of surface area:

Pressure = force/area

Question 2

Barometer

Answer 2

used to measure atmospheric pressure

Question 3

SI unit of force

Answer 3

Newton (N): 1N = 1kg x m/s^2

Question 4

SI unit of pressure

Answer 4

pascal (Pa)

Question 5

Pascal (Pa)

Answer 5

equals a force of one newton exerted on an area of one square meter:
1 Pa = 1 N/m^2

Question 6

Standard Atmosphere (atm)

Answer 6

the average atomsphereic pressure measured at sea level and 0°C

Question 7

Units of pressure

Answer 7

1 torr = 1 mmHg = (1/760) atm = (101.325/760) kPa = 133.322 Pa
1 atm = 101.325 kPa = 1.01325 x 10^5 Pa
1 bar = 1x10^2 kPa = 1x10^5 Pa