Question

What is the entropy change associated with the chemical reaction that occurs when iron oxide is converted to its metal form?
Fe2O3(s) + 3CO(g) ? 2Fe(s) + 3CO2(g)

A. Positive
B. Zero
C. Cannot be determined
D. Negative

Answer 1

@aaronq do you know the answer to this one?

Answer 2

I'm pretty sure it's D right?

Answer 3

To assess the change of entropy you look at the number of gas molecules in the products and the reactants - if more gas molecules are produced then entropy is positive.

Here it's zero

Answer 4

ok thanks!

Answer 5

no problem

Answer 6

wait no its positive @aaronq

Answer 7

there are 3 gas molecules on both sides, so there is no net gain