A closed bottle containing air is heated. What happens to the pressure inside the bottle, and why?

6 views 0 helpful Updated Jul 27, 2026
Appears in Class 8th
Solution ✔ Verified
  • APressure increases because air molecules move faster and collide more frequently with the walls.
  • BPressure decreases because air molecules expand and move slower.
  • CPressure remains the same as the volume is constant.
  • DPressure increases because more air enters the bottle.
Explanation

When a closed bottle of air is heated, the kinetic energy of the air molecules increases, causing them to move faster. These faster-moving molecules strike the walls of the container with greater force and more frequently, leading to an increase in pressure inside the bottle.

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