Test 1 question 6

[904940852]

How do you work out and get the answer to question 6 on the test?

[Chem_Mod]

This is a Hess’s Law problem. You have to add up given reactions in the way that you get you top desired reaction. For example, if you see that a substance in your final reaction is on the right side, but is on the left side in the given reaction, you have to flip it and flip the sign of delta H as well. If you need two moles of a substance at the end but you have only one in the given reaction, double the coefficients and double the delta H as well, etc.