Kinetics and Equilibria Flashcards

0
Q

What is activation energy?

A

The minimum energy required for a reaction to occur

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1
Q

What is the collision theory?

A

A reaction will only take place if two particles collide in the right direction and with at least a minimum amount of kinetic energy.

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2
Q

State the effect on the rate of reaction by a change in temperature.

A

Increase in temp - molecules will have more kinetic energy, therefore a greater proportion will have the minimum kinetic energy so more particles can react.
Decrease in temp - molecules have less kinetic energy so a smaller proportion have minimum kinetic energy so less particles can react.

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3
Q

State the effect of a change in concentration on the rate of reaction

A

Increase in concentration - particles will be closer together and so will collide more frequently
Decrease in concentration - particles will not be as close and so collide less frequently

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4
Q

What is a catalyst

A

A catalyst increases the rate of reaction by providing an alternative pathway with a lower activation energy. This catalyst is chemically unchanged at the end of the reaction.

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5
Q

What is dynamic equilibrium

A

The forward and backward reaction are occurring at the same constant rate, the concentrations of reactants and products are constant. This only occurs in closed systems.

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