2
practice examMultiple Choice

Practice Exam

Question 2 • Chemistry

The volume of a gas decreases to half of its original volume, but the gas maintains the same number of moles and temperature. According to the ideal gas law, what will most likely happen to the pressure?

Answer
A
It will increase slightly.
B
It will double.
C
It will decrease.
D
It will remain the same.

Explanation

The ideal gas law is PV = nRT. Since the amount of gas and temperature stay the same, nRT is constant, so pressure is inversely proportional to volume. Halving the volume therefore doubles the pressure, making “It will double” the correct choice.

AI-written and checked against the verified answer.

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