You can make an arrow one of several ways. --> or ==> or >>> bu please, not |.
I think there is an error in your post; i.e., that reaction is NOT 3339.6 kJ/mol but 3339.6 kJ/reaction which is for 2 mols. That's the value I will use. Also, note that the question asked is for the REVERSE reaction which makes all of the numbers negative.
-3339.6 x (0.455*3.60/2) = ? kJ.
Consider the reaction
2 Al2O3(s) ! 4 Al(s) + 3 O2(g) .
�H = +3339.6 kJ/mol
What is the change in heat when 0.455 L of
a 3.60 M Al solution reacts with excess O2 ?
1. -424 kJ
2. -2735 kJ
3. -1695 kJ
4. -1368 kJ
5. -26,521 kJ
6. -21,962 kJ
7. -685 kJ
8. -5477 kJ
1 answer