This page presents basic problems involving entropy, enthalpy, free energy and
equilibrium constants. When you press "New Problem", a question will appear. Since browsers are inconsistent regarding the display of math symbols
(such as the delta), 'd' is used in place of the delta in these problems. Determine the needed value, enter it in the answer cell and press "Check answer." Use "e" notation to enter numbers in scientific notation (i.e. 1100 would be 1.1e3) Pay attention to specified dimensions and to the signs. Results and a running score appear in the table.