# How does temperature affect the speed of molecular motion?

Relevance

Temperature and the motion of molecules are all related. Temperature is a measure of the average kinetic energy of the molecules in a material. Heat is the energy transferred between materials that have different temperatures. Increasing the temperature increases the translational motion of molecules

Vise Versa.

In order to understand the nature of heat and temperature, it is necessary to appreciate the fact that matter consists of moving particles (atoms or molecules) which can interact more or less strongly with one another. This forms the basis of the kinetic theory.

The motion of the particles is increased by raising the temperature. Conversely, the motion of the particles is reduced by lowering the temperature, until, at the absolute zero (0 K), the motion of the particles ceases altogether.

Because the particles are in motion, they will have kinetic energy. The particles will not all have the same energy, and the energy of the particles is constantly changing as they undergo changes in speed. Thus, for a given sample of matter, we can only talk about the average kinetic energy of the particles.

KINETIC ENERGY is energy which is due to motion.Temperature is a measure of the average kinetic energy of the particles

• JJ
Lv 7

The higher the temperature, the higher the degree of molecular motion.

E = kT where E is the energy related to the degree of molecular motion, k is a constant and T the temperature in degrees K.

Temperature is a measure of how much energy is in the substance...

the more energy, the faster the molecules are moving and the higher the temperature measured...

the lower the energy, the slower the molecules are moving and the lower the temperature...

theoretically, at absolute zero all molecular motion stops

The motion of the particles is increased by raising the temperature. Conversely, the motion of the particles is reduced by lowering the temperature, until, at the absolute zero (0 K), the motion of the particles ceases altogether.

For a good explanation (animation) of this concept go here:

http://id.mind.net/~zona/mstm/physics/mechanics/en...

• 4 years ago

Temperature impacts diffusion fees simply by fact it motives the molecules of the components that are being subtle to boost while heated and allow for bigger pass consequently transforming into an bigger diffusion cost, or settlement while cooled, removing area and making it harder for the molecules to grow to be interspersed.

pressure * volume / temperature = constant

(Kelvin laws)

pressure is a measurement of speed of molecular motion (Kinetic nature of pressure Daniel Bernoulli, 1738)

so, it is directly proportional

higher temperatures excite the molecules, causing them to move at a faster rate. whereas cooler temperatures slow the movement.