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Need the answer in a excel 3. 4. 5. 6. 7. Antoine constants for hexane and heptane are (Psat in mmHg, T in C): C
Need the answer in a excel
3. 4. 5. 6. 7. Antoine constants for hexane and heptane are (Psat in mmHg, T in C): C Tmin 6.91058 1189.64 226.28 -30 hexane n-he tane 6.89677 1264.9 216.544 -2 Tmax 170 123 (Recommended: do a hand calculation of Psat to be sure you understand the proper use Of log and T, e.g. check against the normal boiling point. This calculation does not need to be submitted.) Determine the bubble temperature and vapor composition of a mixture that is 30 mol% hexane at 750 mmHg. Document your calculations. Repeat calculations across the composition range at intervals of 0.1 at 750 mmHg. Summarize the calculated values in a table. There is no need to document these calculations by hand since they use the same method as problem 3. Create at T-xy an y-x plot using lines. Enlarge the plots sufficiently that you can use them for reading values in subsequent problems. Submit your plots. Calculate the relative volatility (hexane/heptane) at hexane mole fractions of O, 0.5, 1 for 750 mmHg (You may be able to use results already calculated in problem 4. Also, calculate the v,'7j71 using the relative volatility at the two composition end points geometric mean a = indicated as O and I. Comment on the comparison of the geometric mean with the value found at 0.5. Using the mean relative volatility and the simplified equation given in the notes, estimate the y-x plot by assuming the relative volatility is constant across the composition range at this value. Copy your plot from problem 4 and add a line for the assumption of constant a. Include a legend. Comment on the accuracy of the approximation for this mixture compared to the more detailed Raoult's law calculation. Copy the y-x figure from problem 4. For a flash at the conditions ZF = 0.6 and a L/F = 0.7, add the q-line to your plot (drawing is recommended instead of computing the line so that you understand how to place the line using x or y intercepts). Enlarge the plot sufficiently so that you have confidence in the precision of your q line. Mark the point clearly that determines the compositions leaving the flash drum. What value of x and y would result for a flash at this condition (within 2 mol%)? Return to the T-xy plot from problem 4. Read off the temperature that corresponds to this flash condition of problem 6. Document your resulting temperature. Calculate the K-ratios at this temperature using vapor pressures. Using the Rachford-Rice equations for x and y, calculate the values for hexane and compare with the values found graphically in problem 6.
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