Chemistry
posted by Hannah on .
The four statements below are used for applications of Hess's law. One of the statements is erroneous. Choose that statement.
a) the value of delta H for any reaction that can be written in steps is the sum of the values of delta H for each of the individual steps.
b) when an equation is reversed written in the opposite direction the sign of delta H must also be reversed (+ becomes  or  becomes +)
c) formulas cancelled from both sides of an equation must be for substances in identical physical states.
d) The value of delta H is independent of the stoichiometry, so that, if we change the equation, delta H does not change.
I chose d as the answer that is erroneous. Is this correct?

I agree.