8.1 The gas phase

Question 1

list 4 features of gases

Answer 1

Gases are the least dense phase of matter

Gases are fluids and therefore conform to the shapes of their containers

Gases are easily compressible (while liquids are not)

Only very weak intermolecular forces exist between gas particle

Question 2

4 variables that define the state of a gaseous sample

Answer 2

temperature (T), pressure (P), volume (V), and number of moles (n)

Question 3

the SI unit for pressure

Answer 3

pascal (Pa)

Question 4

pressure unit conversions

Answer 4

1atm = 760 mmHg ≡ 760 torr = 101.325 kPa

Question 5

Sphygmomanometers

Answer 5

medical devices that measure blood pressure

Question 6

mercury barometer

Answer 6

measures incident (usually atmospheric) pressure

as pressure increases, more mercury flows out of the column under its own weight, decreasing its height

Question 7

Standard temperature and pressure (STP)

Answer 7

Standard temperature: 273K or 0C

Standard pressure: 1 atm