The temperature - When you raise the temperature of a system, the molecules bounce around a lot more (because they have more energy). There are quite a lot of students who get shivers down the spine at the very thought of chemistry.The real formula of rate of reaction is mols produced divided by time.
The temperature - When you raise the temperature of a system, the molecules bounce around a lot more (because they have more energy). There are quite a lot of students who get shivers down the spine at the very thought of chemistry.
Those obtaining grade 8 or higher, will be eligible to continue studying Chemistry at A level.
There is no longer a coursework element to GCSE Chemistry.
For a reaction to take place, the particles of the substances that are reacting have to collide.
Only a certain fraction of the total collisions cause chemical change; these are called "successful collisions".
or have I just complicated things beyond comprehension I believe that 1/T gives you an average rate for a reaction.
This is because T is the overal time for the reaction to finish however, the formula doesnt take into account that the rate of reaction is likely to be quicker at the start rather than the end (assuming its 1st/2nd order) .....having said that im no expert so i might be wrong.Ah right I see now, you're after the answer to one of the questions on the OCR Chemistry A Assessed Practicals for this year.The answer actually has nothing to do with 1/t being an estimate, it's worked out practically.The theory of practical work and How Science Works will be examined in the final written papers.Students will have many opportunities to gain and practise these skills throughout the three year course.Hypothesis The rate of a reaction is the speed at which a reaction happens.If a reaction has a low rate, that means the molecules combine at a slower speed than a reaction with a high rate.But if you are planning to work out the rate constant ,k, or other reaction kinematics it can lead to problems, if I remember correctly.This is because the reaction is rapid and the substrate concentration quickly declines. Comparison can only be made at the start of the reaction where controlled variables such as substrate concentration are the same for all levels of the independent variable.Some reactions take hundreds, maybe even thousands of years while other can happen in less than one second.The rate of reaction depends on the type of molecules that are combining.