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Jump to one of the following chemical thermodynamics parts:   Choose One Index and Quizzes

There's not much to this section except for three quizzes. I'll expand on it as I get time. The quizzes will see if you can calculate the enthalpy of reaction using standard enthalpies of formation, entropy change using standard entropies, and free energy of reaction using standard free energies. Hess' law can be stated for the enthalpy of reaction-

Or, the enthalpy of reaction is equal to the sum of the enthalpies of formation for the products minus the enthalpies of formation for the reactants.

We can also use it for entropy change-

And we can also use it for the free energy of reaction-

Reminder- don't forget to explicity account for the moles for all the reactants and products.

Table of Standard Enthalpies of Formation

Table of Standard Entropies

Table of Standard Free Energies of Formation

When you grade your answer in any of these quizzes, your answer must be entered to the first decimal place even if it's ".0". Eventually, I'll reformat the data tables so all the data are reported to the first decimal place. So, the quiz requires it even if the significant figures' check require something else. If you need a hint as to a specific enthalpy of formation, check the box in the quiz window and run your cursor over a chemical formula. The value will show up in the status bar at the bottom of the quiz window.

Currently, there are 34 unique reactions available. Since the reactions can be written in either direction (reverse the reactants and products), this means there are 68 random reactions available for you to practice on.