Pressure from Molecular Theory — Practice Quiz

Question 1

Kinetic theory pressure formula P = (1/3)·ρ·v_rms². If T doubles, P doubles because:

Accepted Answer

v_rms² doubles ⇒ P doubles

Answer

v_rms doubles

Answer

Both

Answer

Independent

Question 2

v_rms of N₂ at 300 K (M = 28 g/mol):

Accepted Answer

~ 517 m/s

Answer

~ 343 m/s

Answer

~ 1000 m/s

Answer

~ 100 m/s

Question 3

Mean KE per molecule of an ideal gas at temperature T:

Accepted Answer

(3/2)k_BT

Answer

k_BT

Answer

(1/2)k_BT

Answer

k_BT²

Question 4

Kinetic-theory pressure derivation assumes:

Accepted Answer

Elastic collisions, random motion, isotropic

Answer

Inelastic collisions

Answer

Specific molecules

Answer

Constant T

Question 5

If number of molecules doubles (same T), pressure (at constant V):

Accepted Answer

Doubles

Answer

Halves

Answer

Stays the same

Answer

Quadruples