SAT II Chemistry : Gas Laws

Study concepts, example questions & explanations for SAT II Chemistry

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Example Questions

Example Question #1 : Gases

Suppose that an ideal gas at  and 2.0 atm has a volume of 11.2 cubic meters. Which of the following expressions represents the volume of the gas, in cubic meters, if the temperature were increased by  and the pressure decreased to 1.5 atm?

Possible Answers:

Correct answer:


First of all, the unit degrees Celsius should be converted to Kelvins by adding 273. This means that the temperature increases from 273 K to 323 K.

Next, the combined gas law can be used.


Plugging in the known values gives


and solving for the volume gives


Rearranging shows this is clearly equivalent to the correct answer, .

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