DAT Gen Chem Question

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Okay so I understand when doing problems associated with Equilibrium constants (K) and reaction quotients (Q) only gases and aqueous components are considered. In what types of question do I consider s,l,g, and aq other than standard stoichiometry.

 

[DAT Destroyer]

Okay so I understand when doing problems associated with Equilibrium constants (K) and reaction quotients (Q) only gases and aqueous components are considered. In what types of question do I consider s,l,g, and aq other than standard stoichiometry.

When you are doing equilibrium do not concern yourself with solids or pure liquids because their concentrations are constant. Consult any General Chemistry book to see some good examples.

Hope this helps

Dr. Romano

 

[Incis0r]

Okay so I understand when doing problems associated with Equilibrium constants (K) and reaction quotients (Q) only gases and aqueous components are considered. In what types of question do I consider s,l,g, and aq other than standard stoichiometry.

This is what I have so far:

1. In those questions that deal with heats of formation- you need to make sure elements are in their standard states (so Br2 is liquid, Hg is liquid, O2 is gas, all other metals are solids, etc.) and only 1 mol of product is produced.

2. In entropy questions- if they ask whether DeltaS is positive or negative...look at the phases.

3. Calorimetry problems

Does this answer your question?