Intermolecular Forces, Gas Laws and the Ideal Gas Equation

Name: Intermolecular Forces, Gas Laws and the Ideal Gas Equation
Author: StemPy Lab

Why one substance is a gas at room temperature and another is a liquid.

The forces between molecules and the three states of matter.
The gas laws of Boyle, Charles, Gay-Lussac and Avogadro, and the ideal gas equation with the right units.
Then Dalton's law of partial pressures and Graham's law of diffusion.

3 lessons, about 1 h 45 min3 simulations10 problems8 practice questionsPython in every lesson

Course outline (3 lessons)

Lesson 1about 35 min
Intermolecular forces and the three states
Water is a liquid at room temperature and helium is a gas at $-269\ ^\circ\text{C}$ . The difference is the strength of the forces between the molecules, set against the thermal energy that tries to pull them apart. We meet the four kinds of force and see how they decide the state of a substance.
1 simulation2 practice questions1 Python program2 problems
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Lesson 2about 35 min
The gas laws and the ideal gas equation
A bicycle tyre gets harder when you pump air in, and a sealed can bulges in the sun. The gas laws tell us how pressure, volume, temperature and the amount of gas depend on each other. They combine into one equation, $PV = nRT$ , and the whole skill is to use its units correctly.
1 simulation3 practice questions1 Python program5 problems1 Python lab
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Lesson 3about 35 min
Gas mixtures, partial pressures and diffusion
Air is a mixture of gases, and a smell of cooking spreads across a room. Dalton's law tells us how each gas in a mixture contributes to the pressure. Graham's law tells us why light gases spread faster than heavy ones. Both laws come straight from $PV = nRT$ .
1 simulation3 practice questions1 Python program3 problems1 Python lab1 question set1 note
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Board exam format15 questions · 20 min

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