Ch5 Gases ]

Question 1

characteristics of gases

Answer 1

• highly compressible
• pressure ^ , volume decreases
• occupy small % of their container

Question 2

SI unit of force =

Answer 2

Newton

Question 3

SI unit for pressure =

Answer 3

Pascal

Question 4

bar =

Answer 4

10^5 pascal/ Newton

(1m^2 column of air) = 100kPa

Question 5

Atmospheric pressure @ sea level

Answer 5

1 bar / 100 kPa

Question 6

Standard atmospheric pressure

Answer 6

760mmHg

Question 7

Summary of pressures

Answer 7

1 atm = 760mmHg = 760 torr = 1.01325 x 10^5KPa = 101.325 kPa = 1.01325 bar

Question 8

Boyles Law

Answer 8

volume of a fixed quantity of gas @ constant pressure is inversely proportional to its pressure
(hyperbole)
PV = Constant / V= K/P

Question 9

Charles Law

Answer 9

Volume of a fixed quantity of gas at constant pressure is directly proportional to its temperature
V = K x P

Question 10

absolute zero =

Answer 10

-273 Celcius or 273 Kelvin

Question 11

Avogadro’s Hypothesis

Answer 11

Equal volumes of gases at = pressure and temp contain the same # of molecules

Question 12

Avogadro’s law

Answer 12

volume of gas at a given temp & pressure is directly proportional to the # of moles of gas

V= constant x n

Question 13

Avogadro number

Answer 13

22.4 L of gas @ 0 celsius and 1 atm. = 6.023x10^23 mol

Question 14

Ideal gas equation

Answer 14

PV = nRT
R= gas constant

Question 15

Ideal gas equations & gas laws

Answer 15

P1V1/ n1T1 = P2V2/n2T2