Please enable JavaScript.
Coggle requires JavaScript to display documents.
C6 - Rate and extent of chemical change - Coggle Diagram
C6 - Rate and extent of chemical change
Rates of Reactions
ROR equation
the chemical rate of reaction is how fast the reactants are changed into products
graph img
activation enery = minimum amount of energy particles need to react
rate of reaction depends on:
the energy transferred during a collision - particles have to collide with enough energy for the collision to be successful
the collision frequency - the more collisions per second, the faster the reaction is
factors affecting the rate of reaction
increasing concentration or pressure
more concentrated = more particles in the same volume
more pressure = same amount of particles in a smaller space
makes collisions between reactant particles more frequent
Increasing the temperature:
if the particles move faster they will collide more frequently
also if they have more energy the collisions have enough energy to make the reaction happen
when the temperature is increased the particles move faster
increase the surface area
breaking up a solid will increase its surface area:volume ratio
meaning that for the same volume of the solid, the aprticles around it will have more area to react with, increasing the collisions per second
using a catalyst
a substance that enables a chemical reaction to proceed at a usually faster rate without being used in the reaction itself