Question

questions 6 - 13: circle the choice that best answers each question. 6. as a change of state takes place, heat and temperature____. a. increases, stays the same b. stays the same, stays the same c. stays the same, changes d. increases, increases 7. a change of state is a(n) process. a. irreversible b. reversible 8. what is different at the molecular level between a solid and a liquid? (multiple can be correct) a. the type of molecule b. strength of intermolecular forces c. speed of particles d. nothing 9. which of the below statements are true? a. there can be a change in heat (kj) without the temperature changing b. heat remains constant through a change of state c. temperature changes through a change of state d. heat and temperature are the same 10. rank the states of matter from slowest to fastest particle speed. a. gas, solid, liquid b. solid, liquid, gas c. gas, liquid, solid d. solid, gas, liquid 11. when heat is removed from a solid, what happens? a. the particles move faster b. the solid becomes a liquid c. the particles move slower d. nothing 12. describe the movement of solid particles. a. no movement b. vibrational c. fast d. flowing 13. as the speed of the particles decreases, ____. a. intermolecular forces become stronger b. intermolecular forces become weaker c. intermolecular forces do not change d. energy increases

Explanation:

1. During a change - of - state, heat is absorbed or released for phase transition while temperature remains constant.
2. Phase changes like melting, freezing, etc., are reversible processes.
3. Solids have stronger intermolecular forces, slower - moving particles compared to liquids. The type of molecule can be the same in solid and liquid states of a substance.
4. During a phase change, heat is used for changing the state and temperature doesn't change.
5. Solids have the slowest particle speed, liquids are faster, and gases have the fastest.
6. Removing heat from a solid slows down the particle movement.
7. Solid particles vibrate in place.
8. As particle speed decreases, intermolecular forces become stronger as the particles are more attracted to each other.

Answer:

1. b. Stays the same, stays the same
2. b. Reversible
3. b. Strength of intermolecular forces, c. Speed of particles
4. a. There can be a change in heat (kJ) without the temperature changing
5. b. Solid, liquid, gas
6. c. The particles move slower
7. b. Vibrational
8. a. Intermolecular forces become stronger