chap 9

Question 1

5 parts of kinetic molecular theory of gases

Answer 1

1. gases made up of small atoms in constant linear motion(any path)
2. distance of separation vv large compred to size of individual atoms(density low)
3. all gas particles behave independently (most ideally at low pressure high temp)
4. gas particles collide with each other and walls but don’t lose energy(enegry transfered)
5. ave. kinetic energy of atoms/molecules incre or decre in proportion to absolute temp

Question 2

define Kelvin

Answer 2

directly related to kinetic energy of the system(abs temp) (if all molecular motion stops KE=0)

Question 3

daltons law of partial pressure

Answer 3

total pressure of a gas mixture is the sum of partial pressures of the gases in the mixture

Question 4

what are standard conditions

Answer 4

(1atm)(22.4L)
(1mol)(273K) = 0.0821= R

Question 5

when n & T constant…

Answer 5

P1V1=P2V2 inversly proportional- P1 = 1/(V1)

Question 6

when n & P constant..

Answer 6

V1/T1 = V2/T2 directly proportional

Question 7

when P & T constant…

Answer 7

V1/n1 = V2/n2

Question 8

when V & n constant…

Answer 8

P1/T1 = P2/T2

Question 9

graphs of pressure and volume?

Answer 9

1. V y-axis and P x-axis. looks like elongated half U.
2. PV(k) y-axis and P x-axis. straight horizantal line in middle of y-axis

Question 10

graphs of volume and temp?

Answer 10

1. V y-axis and T x-axis. diagonal line as both increase.
2. V/T(k) y-axis and T x-axis. straight line horizontally at middle y-axis

Question 11

whats constant in combined gas law? formula?

Answer 11

moles. (P1V1)/T1 = (P2V2)/T2

Question 12

avogadros law says..(volume and moles)

Answer 12

equal volumes of gases contain same number of moles

Question 13

when doing density of a gas.. ex calc density of O2 at STP.

Answer 13

calc density of O2 at STP.
get mass and divide by standard volune aka 22.4L

Question 14

what is heat?

Answer 14

energy transfer