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Mistake Master · AP Physics 2 · Unit 9 · Step-Through Animation

The Gas Law Is One Ratio

You'll learnwhy every gas-law temperature has to be in kelvin, how one full ratio replaces every two-variable rule, and what the ideal gas model actually assumes.

A sealed can reads 300 kPa in a 20 degree room. Carry it into a 40 degree car: has the pressure doubled? The gas says no, and the reason is the temperature scale. Twelve short steps; press Next for each one.

12 STEPS · 6 QUICK CHECKS · KELVIN FIRST · THE FULL RATIO · WHAT IDEAL ASSUMES · v2

one sealed can, one piston · every temperature converted to kelvin first
Before you start
What you're looking at
A sealed can of gas with a pressure gauge, and later the same gas behind a piston that can slide.
The question
What does the gauge read when the can warms up, and which temperature scale is the gas law written in?
Step 1 / 12