ENGINEER 2B03- Final Exam Guide - Comprehensive Notes for the exam ( 29 pages long!)
28 Mar 2018
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Solutions become more ideal as t is raised. > 1 (positive deviations) positive slope, positive heat of mixing i becomes more ideal decreases with t increase, A b bonds very strong, tendency to ordering or compounds positive deviations. A and b do not want to order from the bond energy comparison. However, the entropy contribution to the free energy is strong enough to overcome the weak bonds between a b and we see the solution is made. Free energy is always the combination of enthalpy and entropy 13. Often it is only possible to measure the activity of one component in a solution, but we would like to know the other one; the gibbs-duhem equation makes this possible. The partial molar free energy of mixing is: Simple relationship for the changes in activities of a and b 14. If we know how a changes with composition we can integrate that equation. The tail on the right is the biggest problem.
