年代AT II Chemistry : Gas Laws

年代tudy concepts, example questions & explanations for SAT II Chemistry

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Example Questions

Example Question #1 :Gas Laws

年代uppose that an ideal gas atand 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 byand the pressure decreased to 1.5 atm?

Possible Answers:

正确答案:

Explanation:

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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