A gas occupies 5.0 L at a pressure of 1.0 atm and a temperature of 300 K. If the amount of gas and temperature remain constant, what will the volume be when the pressure is increased to 2.0 atm?
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Correct answer
A. 2.5 L
Principle or equation
Boyle's law: for a fixed amount of gas at constant temperature, P1V1 = P2V2.
Why this answer is correct
Using Boyle's law: V2 = P1V1 / P2 = (1.0 atm × 5.0 L) / 2.0 atm = 2.5 L. The volume decreases as pressure increases.
Example
If a gas at 1.0 atm and 4.0 L is compressed to 2.0 atm, new volume = 2.0 L.
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