A fixed mass of ideal gas in a rigid container is heated from 300 K to 600 K. What happens to its pressure?
Answer and explanation
Correct answer: C. It doubles
- Step 1: At constant volume and amount, P/T is constant (Gay-Lussac). Step 2. T doubles from 300 K to 600 K, so P doubles. Answer: pressure doubles. Why not the others: constant pressure would need an expandable container, collisions get harder and more frequent when hotter, and the mean kinetic energy is proportional to T itself, not T squared.
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