The Particulate Nature of Matter

Question 1

What are the four factors that can affect pressure?

Answer 1

Force, area, speed of particles, amount of particles.

Question 2

How do gas particles create pressure?

Answer 2

Gas particles collide with the walls of the container, and the force from these collisions creates pressure.

Question 3

What happens to pressure when the speed of gas particles increases?

Answer 3

Pressure increases because the particles collide more forcefully and frequently with the walls.

Question 4

What happens to pressure when the amount of gas particles increases in a fixed volume?

Answer 4

Pressure increases because there are more collisions with the walls of the container.

Question 5

Why does pressure decrease when the area increases, assuming force stays constant?

Answer 5

Pressure is inversely proportional to area, so spreading the same force over a larger area reduces pressure.

Question 6

What are the different movements of solid, liquid and gases if we use the vibrational, rotational and translational concept?

Answer 6

Solids: Vibrational (and rotational); particles move very slowly.

Liquids: Vibrational, rotational, and translational; particles move quickly.

Gases: Vibrational, rotational, and translational; particles move very quickly.

Gases, because their particles move freely in straight lines.

Question 7

Do liquid and gas particles vibrate?

Answer 7

Yes, liquid and gas particles vibrate, liquid and gas particles primarily exhibit translational motion.

Question 8

Three levels of representation of chemistry

Due to the intrinsic nature and complexity of chemistry, chemical knowledge has been learned at three levels, the _______, ________ (or______ ) and _________.

What does each of the level mean?

Answer 8

Due to the intrinsic nature and complexity of chemistry, chemical knowledge has been learned at three levels, the macroscopic, microscopic (or submicroscopic) and symbolic.

At the Macroscopic level: chemical processes and phenomena are visible and observable (phenomena (observable)

At the Microscopic level these are interpreted and explained by the arrangement and motion of particles such as molecules, atoms and ions. (atoms, chemical bonds, ions (invisible)

Chemistry at the abstract Symbolic level is represented by symbols, numbers, formulae, chemical equations, and structures. (symbols, models (ball and stick/space-filling), formulae, equations, graphs