Answer the following statement(s) true (T) or false (F)
A. The Poynting correction equation can be derived directly from the equation fL = fV, with no assumptions or approximations of any kind. Its accuracy is limited by the accuracy of the estimate of fsat.
B. The shortcut equation can be derived directly from the equation fL = fV, with no assumptions or approximations of any kind. Its accuracy is limited by the accuracy of the measurements of TC, PC and ?.
C. The Clapeyron equation can be derived directly from the equation fL = fV, with no assumptions or approximations of any kind. It is often necessary to make assumptions or approximations in order to solve the equation.
D. The Antoine equation can be derived directly from the equation fL = fV, with no assumptions or approximations of any kind. It should only be used in recommended temperature ranges.
E. None of the above are true.
A. Incorrect. Poynting’s correction makes one assumption: Constant molar volume.
B. Incorrect. The shortcut equation contains several approximations, such as Equation 8.40.
C. Correct. The Clapeyron equation assumes nothing. The Clausius-Clapeyron equation, however, incorporates assumptions that allow the equation to be integrated to a solution.
D. Incorrect. The Antoine equation is purely empirical and has no derivation behind it at all. It is essentially a three-variable curve fit to data, much like you can perform on a spreadsheet.
E. Incorrect. One of these is true.
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