1. (a) An
explanation to include:
1. moving gas particles;
2. hitting container walls;
[Allow bouncing off the sides for 2 marks]
[Ignore vibrating/collisions with other particles] 2
2. hitting container walls;
[Allow bouncing off the sides for 2 marks]
[Ignore vibrating/collisions with other particles] 2
(b) increases;
increases;
stays the same;
stays the same; 4
increases;
stays the same;
stays the same; 4
(c) (i) increases;
in proportion/ 2
in proportion/ 2
(ii) correctly indicated – intercept with
horizontal axis; 1
(iii) zero/minimum; 1
[10]
2. (a) four points plotted correctly;;
4/3 correct - 2 marks
2 correct - 1 mark
straight line drawn; 3
4/3 correct - 2 marks
2 correct - 1 mark
straight line drawn; 3
(b) –260 to –280;;
[Allow an answer between +260 – +280 for 1 mark] 2
[Allow an answer between +260 – +280 for 1 mark] 2
(c) impossible
temperature/this is below absolute zero/pressure is
zero/no movement; 1
zero/no movement; 1
(d) (i) 273; 1
(ii) –196;;
[Allow 77-273 for 1 mark] 2
[Allow 77-273 for 1 mark] 2
[9]
3. (a) (i) (particles)
collide with tyre wall;
Ignore
push/pushing
this produces a force; 2
(ii) more
collisions (/sec); 1
(b) correct conversion into K;
= P2;
1.72 × 105 = P2; 3
for
2 marks accept any one of
2.08
× 105
temps
swopped over (1.68 × 105)
for
1 mark accept 1.39 × 105
units
if seen must be correct
do not accept 1.7 unless the working is shown
do not accept 1.7 unless the working is shown
[6]
4. (a) (i) particles collide with/hit/bounce off
(container) wall/eq; 1
(ii) An explanation to include:
1. greater volume/space/room;
2. fewer/less collisions (with container); 2
2. fewer/less collisions (with container); 2
(b) (i) increases/eq; 1
(ii) increases/eq; 1
[5]
5. (a) (102
+ 273 =) 375; 1
(b)
|
|
decreases
|
Stays
the same |
increases
but does not double |
doubles
|
|
|
temperature
of gas
|
|
|
 |
|
1
|
|
pressure
of gas
|
|
|
|
|
1
|
|
kinetic
energy of particles
|
|
|
|
|
1
|
;;;
(c) collisions; 1
with walls etc; 1
with walls etc; 1
[6]
