Enthalpy of Mixing and Deviation from Raoult's Law: Example Problems

Try to solve these problems before watching the solutions in the screencasts.

Example Problem 1

Example Problem 3 (optional)

One pound of a 20% H_{2}SO_{4} solution at 60°F was mixed with a half-pound of an 80% H_{2}SO_{4} solution at 60°F. How much heat must be removed to carry out this process isothermally?