Tue, 30/04/2013 - 19:40
#1
Chemistry ISA
Hey,
Does anyone know anything about the Rates of Reaction ISA? We weren't taught about it and then got set the ISA and now our class has no idea what's going on. We've done the practical with the thiosulphate and hydrochloric acid (waiting for the 'x' to disappear) but we have the paper tomorrow and I am not sure what I can revise.
Does anyone have any ideas or anything that can help me?
Cheers :')
.A high temperatue will increase collisions, make particles move faster and increase chances of particles colliding with enough activation energy to react
.A large surface area will mean there is less space for particles so there will be more collisions and increase chances of particles colliding with enough activation energy to react
.A high concentration will mean there is more particles in the same space so it will increase chances of particles colliding with enough activation energy to react
.A high pressure means there is less space for (gas) particles so it will increase chances of particles colliding with enough activation energy to react
.The use of a catalyst will reduce the activation energy required for the rection to occur and will increase the rate of decomposition. Its also reuseable as it remains chemically unchanged
Hope this helped and good luck
i have undersood it well before i was struggling