2.3: Pressure of Gasses

Question 1

Define pressure

Answer 1

Force applied on area of a surface

Question 2

How is pressure determined for gasses?

Answer 2

of collisions between particles and container wall (ex: more particles in a ball = more collisions between air and ball surface = harder ball)

Question 3

Will one of two gasses at the same temperature but at different weights inflate a balloon better?

Answer 3

No, same temp = same Ek, making heavy gas travel slow with less collisions and light gas travel fast with more collisions, equivalent force

Question 4

How does gravitational force influence the atmosphere?

Answer 4

Force keeps the atmosphere from floating away

Question 5

What is atmospheric pressure?

Answer 5

Force exerted by a column of air located above an object/individual

Question 6

How does altitude affect atmospheric pressure?

Answer 6

Higher up = less air = less collisions = lower pressure, vice versa for lower down

Question 7

With what tool is atmospheric pressure measured?

Answer 7

Barometre (mercury-filled tube)

Question 8

List the conversions for atmospheric pressure

Answer 8

101.3kPa = 760mm Hg = 1.00atm = 14.7 psi