A balloon stays inflated because, every instant, millions of air molecules slam into its inner surface. Each tiny impact is nothing on its own, but together they push the walls outward. Heat the gas and the bombardment grows fiercer.
Gas pressure is caused by particles colliding with the walls of their container. Each collision pushes on the wall, and the force of these collisions per unit area is the pressure. Raising the temperature makes the particles move faster, so they hit the walls harder and more often, raising the pressure.
The pressure of a gas is caused by its particles colliding with the walls of the container; it is the force of these collisions acting per unit area of wall.
Pressure comes from collisions, not from particles statically pressing on the walls.
Change the temperature of a trapped gas and watch how the collisions, and so the pressure, change.
Four quick checks. Each correct answer earns XP and lights this skill on your star map.
Gas pressure is caused by...
If a fixed mass of gas is heated at constant volume, the pressure...
Each collision of a particle with the wall delivers a small...
At a higher temperature the gas particles move...
Every part of the behaviour follows from how often and how hard the particles strike the walls.
Gas pressure is the result of particles striking the walls, not of the particles simply pressing against them while still. When you heat a gas at constant volume, the pressure rises because the same particles collide with the walls more frequently and with greater force.
Unlocks once the four checks above are done. Worth more XP, written in the style of Paper 2.
A sealed rigid can of gas is heated. The pressure inside rises because the particles...
Doubling the kelvin temperature of a fixed mass of gas at constant volume roughly...
Gas pressure is best described as the...
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