📚 Learning Guide
Ideal Gas Law
medium

If 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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Choose the Best Answer

A

The pressure will double.

B

The pressure will remain the same.

C

The pressure will decrease.

D

The pressure will triple.

Understanding the Answer

Let's break down why this is correct

Answer

Gay‑Lussac’s Law says that when a gas’s volume is fixed, its pressure changes in direct proportion to its temperature. So if the temperature goes from 300 K to 600 K, the ratio of the final to initial pressure is 600 K ÷ 300 K, which equals 2. That means the pressure will double. For example, if the gas starts at 1 atm at 300 K, it will rise to about 2 atm when the temperature reaches 600 K.

Detailed Explanation

When the volume of a gas does not change, its pressure rises linearly with temperature. Other options are incorrect because The idea that pressure stays the same ignores the fact that temperature feeds energy into the gas molecules; Thinking pressure decreases assumes hotter gas pushes outward less, but in fact hotter gas pushes harder.

Key Concepts

Volume (V)
Temperature (T)
Topic

Ideal Gas Law

Difficulty

medium level question

Cognitive Level

understand

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