These are some things I found very helpful when I did my Chemistry Coursework. This is meant to be used for the Coursework where you drop zinc powder into copper sulphate.
Energy Diagram
I don't know how you can write about his in your Coursework but its worth putting it in. Even if you make no comment on it. It shows the marker that you have done your research (and searching the Internet is a form of research). It is relevant because my teacher told me that it was good I put it in. So its worth putting it in yourself. Although the diagram on the right with the triangle is not really worth putting in. But its up to you.
Working out the energy released
Energy Released = Mass of copper Sulphate x 4.2 x Temperature change
You will then get some figures for the energy released in the reaction. Just make a table of these and you should also plot a graph the graph should be similar to the graph you plotted for the grams of zinc to the temp. change.
Here are some other equations which may be of use to you
The number of moles = number of cm3/1000 x Concentration of solution
My final tip will be to work out the reaction rate without using temp. change for the reaction of magnesium and hydrochloric acid you should not use the 1/time thing, but use gas given off per sec. Its much better since you get an accurate indication of how fast the reaction is. Personally I don't understand that 1/time business. So use the equation;
Reaction rate = Gas given off / time taken.
I could just upload my whole Coursework to the Internet for you guys, but that would defeat the point of learning from it. This should help you a lot AND IS NOT CHEATING. Because all you are doing is research. Just because its all on one page it is not cheating. What is the difference between using the Internet for your info or using text book? The difference is that the Internet is a lot quicker.
By the way I got 8, 8, 8, 6 in my Coursework Hopefully you will get the same.