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aqa a level chemistry

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Define the rate of a reaction

the amount of reactant used or product formed per unit time

What must happen for a reaction to happen?

Particles need to collide

Do all particles that collide react with eachother?

Define activation energy

The minimum amount of energy needed for particles to react

What does the Maxwell Boltzmann distribution represent

The distribution of kinetic energy for a certain number of molecules

What does the peak on the Maxwell Boltzmann distribution curve represent?

This is the most likely energy of any single molecule

What would happen to the Maxwell Boltzmann distribution if a catalyst was used

The number of molecules with energy greater than or equal to Ea would increase

Define catalyst

A catalyst is a substance that increases rate of reaction by providing an alternative reaction pathway with lower activation energy. The catalyst is unchanged

Explain how the Maxwell Botlzmann distribution curve would change with an increase in temperature

-particles have more kinetic energy and move faster, many more will have energy equal/greater than Ea, shifting the curve to the right with a lower peak

What effect does an increase in concentration have on rate of reaction?

Particles closer together, more collisions mean more successful collisions and increased rate