The kinetic theory states that all particles are continuously moving. The speed at which such particles are moving is dependant on the temperature of the surroundings; the warmer the temperature, the faster they move.
The speed of particles is dependent on temperature;
- At 100K all of the particles have low energy and thus low speeds
- At 1000K the particles have more energy and thus there will be a mixture of speeds, ranging from slow to very fast.
It is important to note that the area under each temperature graph is the same, as this represents the number of particles. When changing the temperature only the number of particles at each molecular speed changes, but the total number of particles remains the same.