Use the Antoine equation to find the vapor pressure of pentane at 44.7 °C.
A. 1044 MPa
B. 0.139 MPa
C. 11.0 MPa
D. 2.7 kPa
E. None of these are correct.
A. Incorrect. Remember the equation returns values in mm Hg; you must convert it.
B. Correct. The substance is much more volatile than water
C. Incorrect. You CANNOT use kelvins—or any other units—that the Antoine equation does not specify. This is an empirical equation (a lot of curve fitting) so it only works in the single set of units it was derived for.
D. Incorrect. You have probably used the wrong base exponent (e instead of 10) to reverse the logarithm.
E. Incorrect. One of these is accurate.
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Fill in the blank(s) with the appropriate word(s).
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A.
B.
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D.
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