Compare the number and freedom of particles before and after the change, prioritising gas formation or loss and explaining how lattice ions become dispersed in solution.
Ammonia is manufactured in the Haber Process.
In this process, pressures between 100 atm and 300 atm and temperatures between 675 K and 725 K are usually used.
Explain, using ideas about disorder, whether the sign of your answer to (a)(i) is as expected.
An explanation that makes reference to the following points: (Yes because....) - Disorder / number of ways of distributing energy quanta decreases (1) - As number of molecules / moles / particles (of gas) decreases (1) Allow just "entropy decreases" Do not award just ' S^ system is negative' Allow 4 moles gives 2 moles / 4 molecules gives 2 molecules Do not award 2 molecules gives 1 molecule Allow TE on positive result in (a)(i), but must state answer is unexpected. Ignore no changes of states If (a)(i) is positive and no statement about expectation is made max (1) Positive answer expected scores (0)