Learning Path
Question & Answer1
Understand Question2
Review Options3
Learn Explanation4
Explore TopicChoose the Best Answer
A
The pressure decreases.
B
The pressure increases.
C
The pressure remains the same.
D
The pressure fluctuates randomly.
Understanding the Answer
Let's break down why this is correct
Answer
Boyle’s Law says that for a fixed amount of gas at a constant temperature the product of pressure and volume is constant, so \(P \times V = \text{constant}\). When the volume goes up, the pressure must go down to keep that product unchanged. Think of a balloon: if you let it expand, the air inside spreads out and exerts less force on the walls. For example, if a gas at 1 atm is doubled to twice its volume, its pressure falls to 0. 5 atm.
Detailed Explanation
Pressure falls when volume goes up because the gas molecules are spread over a larger space. Other options are incorrect because Some people think that more space means more frequent hits, but the opposite occurs; The belief that pressure stays the same because temperature is unchanged ignores Boyle's Law.
Key Concepts
Volume (V)
Topic
Ideal Gas Law
Difficulty
easy level question
Cognitive Level
understand
Practice Similar Questions
Test your understanding with related questions
1
Question 1If a gas is heated from 300 K to 600 K while the volume remains constant, what is the expected change in pressure according to Gay-Lussac's Law?
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2
Question 2If the volume of a gas increases while the temperature and the amount of gas remain constant, what is the most likely cause of this change according to the Ideal Gas Law?
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3
Question 3If the pressure of a gas increases while the temperature remains constant, what happens to the volume according to the Ideal Gas Law?
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