Question

skill 2: use models to demonstrate how the position of particles change as a substance changes phases. practice: identify the following models as most representative of a liquid, solid, or gas. self reflection: i can use models to demonstrate how the position of particles change as a substance changes phases. additional notes/evidence: 6. which state of matter has the highest kinetic energy? why? 7. which state of matter has the lowest kinetic energy? why? 8. true or false: the molecules in a solid do not move at all. 9. draw a model of the movement of liquid molecules. be sure to use arrows to represent the movement. the length of the arrow should indicate how fast/far they are moving.

Explanation:

1. Gas particles have the most kinetic energy as they are in constant, rapid, and random motion, having overcome most intermolecular forces.
2. Solid particles are in a fixed - position (relative to each other) with only vibrational motion, so they have the least kinetic energy among the three states.
3. In a solid, molecules vibrate around their fixed positions. They do not have translational motion like in liquids and gases, but they are not completely stationary.
4. Liquid molecules have more freedom of movement than solids (can slide past each other) but less than gases. So the arrow lengths should be between that of a solid (very short, just vibrational) and a gas (long, free - moving).

Answer:

1. Gas. Because gas particles move freely and rapidly.
2. Solid. Because solid particles are closely packed and have limited movement.
3. False.
4. (This requires a visual drawing which can't be provided in text here. But conceptually, draw molecules with arrows of medium length showing they can move past each other but not as freely as gas.)