<u>Answer:</u> Maximum work that can be obtained by given amount of methanol is -343kJ.
<u>Explanation:</u>
For the given chemical reaction:
By Stoichiometry of the reaction:
2 moles of methanol does a work of 1372 kJ.
So, 0.5 moles of methanol will do a work of =
Hence, maximum work that can be obtained by given amount of methanol is -343kJ.
The 3rd diagram is a mixture because it has 2 substances
A carbonate because the oxygen neutralizes the reactive coding of the calcium in its original form.