CHEMISTRY - rates of reaction

?
Rates of Reaction
-
1 of 8
Methods of Measuring Rates of Reaction
1. measure the decreasing mass of the reaction mixture - 2. measure the increasing volume of gas given off - 3. measure the decreasing light passing through a solution
2 of 8
The Collision Theory
"reactions can only happen if particles collide with enough energy to change into new substances" - increasing temperature, concentration, pressure and surface area will increase the rate of collision and therefore the ROR
3 of 8
Activation Energy
the mimimum energy required for particles to react
4 of 8
Energy and Reversible Reactions
a reaction that is exothermic in one direction must be endothermic in the other - the amount of energy released by the exothermic reaction exactly equals the amount taken in by the endothermic reaction
5 of 8
Closed System
no reactants or products can escape - so an equilibrium is reacted
6 of 8
Equilibrium in Reversible Reactions
where the rate of the forwards reaction is equal to the rate of the backwards reaction - here, both reactions happen but the amounts and products remain constant
7 of 8
Le Chatelier's Principle
"when you change the conditions in a system at equilibrium, the position of the equilibrium shifts to cancel out the change" - however, if there are equal numbers of mollecules on either side, changing the pressure will make no difference
8 of 8

Other cards in this set

Card 2

Front

1. measure the decreasing mass of the reaction mixture - 2. measure the increasing volume of gas given off - 3. measure the decreasing light passing through a solution

Back

Methods of Measuring Rates of Reaction

Card 3

Front

"reactions can only happen if particles collide with enough energy to change into new substances" - increasing temperature, concentration, pressure and surface area will increase the rate of collision and therefore the ROR

Back

Preview of the back of card 3

Card 4

Front

the mimimum energy required for particles to react

Back

Preview of the back of card 4

Card 5

Front

a reaction that is exothermic in one direction must be endothermic in the other - the amount of energy released by the exothermic reaction exactly equals the amount taken in by the endothermic reaction

Back

Preview of the back of card 5
View more cards

Comments

No comments have yet been made

Similar Chemistry resources:

See all Chemistry resources »See all Rate of reaction resources »