Question

12
which of these describes effusion?
a gas that closely follows kinetic molecular theory.
force per unit area.
the movement of gas particles through a small hole.
the movement of one material through another from an area of higher concentration to an area of lower concentration.
13
what is the definition of pressure?
force applied per unit area.
the relative size of particles.
the amount of space a substance occupies.
the average kinetic energy of particles.
14
which phase(s) of matter have particles arranged in a regular pattern?
liquid
gas
solid

Explanation:

• For question 12, effusion is defined as the movement of gas particles through a small hole.
• For question 13, pressure is force applied per unit area.
• For question 14, solids have particles arranged in a regular pattern.

Answer:

1. The movement of gas particles through a small hole
2. Force applied per unit area
3. Solid