Question

18
match the following properties to the correct phase(s) of matter.
can be compressed
particles are arranged in an organized way
particles are very far apart
fixed shape
variable volume
particles slide past one another
particles are arranged randomly
19
a student notices that increasing the temperature causes an increase in pressure. which of the following conclusions explains this observation?
increasing temperature increases the number of gas particles in the sample and results in a greater number of collisions.
increasing temperature results in faster - moving particles and more frequent and forceful collisions.
increasing temperature results in the size of the container increasing and fewer collisions among the particles.
increasing temperature causes particles to get larger resulting in a greater number of collisions.

Explanation:

1. Can be compressed: Gases have large spaces between particles, allowing them to be compressed.
2. Particles are arranged in an organized way: Solids have a regular, ordered particle - arrangement.
3. Particles are very far apart: Gases have particles that are widely spaced.
4. Fixed shape: Solids have a definite shape due to strong intermolecular forces holding particles in place.
5. Variable volume: Gases and liquids can change volume depending on the container. Gases can expand to fill the container, and liquids take the shape of the container's bottom part.
6. Particles slide past one another: Liquids have particles that can move relative to each other, allowing them to flow.
7. Particles are arranged randomly: Liquids and gases have a more random particle - arrangement compared to solids.

For the second question, according to the kinetic - molecular theory, increasing the temperature of a gas causes the particles to move faster. Faster - moving particles collide more frequently and with greater force against the walls of the container, resulting in an increase in pressure.

Answer:

1. Can be compressed: Gas
2. Particles are arranged in an organized way: Solid
3. Particles are very far apart: Gas
4. Fixed shape: Solid
5. Variable volume: Gas and Liquid
6. Particles slide past one another: Liquid
7. Particles are arranged randomly: Liquid and Gas
8. Increasing temperature results in faster moving particles and more frequent and forceful collisions.