Enthalpy
1. What is endothermic and exothermic reactions? Endo absorbs energy. Exo releases
energy.
2. What is the Gibbs free energy equation? G = H - TS
3. What does Gibbs free energy tell you? Whether the reaction is spontaneous or not
4. What is entropy? What is enthalpy? Entropy: measure of disorder. Ethalpy: measure
of heat/energy released or absorbed.
5. How would you calculate the enthalpy of a reaction? Products - reactants
6. Draw the energy diagrams for an endo and exothermic reaction.
1. Fe + CuSO4  Cu + FeSO4 (Fe will form +2 ion)
If you had 5 moles of CuSO4, how much of iron (II) sulfate will you get in moles?
5 moles
Solutions
1. Differentiate solute what you are mixing, solvent what you mix it in, solution
mixture of the 2.
2. What is water good at dissolving? Why? Polar molecules because like dissolves like
3. What kind of mixture is a solution? Homogenous
4. What are strong and weak electrolytes? Strong fully dissociate (break up) and weak
partially dissociate
5. List in order from increasing to decreasing which molecules would conduct
electricity best. AlBr3 NaCl CO2
1,3,2
6. What kind, out of the three, electrolytes are considered to be soluble? Insoluble?
Soluble is strong electrolytes and insoluble are nonelectrolytes
7. If I added 45 mols of a compound X and 56 mols of compound Y in a 100-liter water
solution, then after 15 minutes I observed that compound X has disappeared. What
can be assumed by this happening? X is polar, Y is nonpolar. Water is my solvent. X
is a strong electrolyte
8. Determine whether the following would be dissolved in water or methane (CH4) and
state why.
a. HCl W
b. O2 M
c. BF3 M
d. CO2 M
e. H2SO4 W