200 kmole/hr at 4 bar and 30 C containing 40% styrene, 25% methanol and 35% toluene (molar %) is sent to a pre-heater using heat recovered from the overhead product prior to being sent to a 21-stage distillation column with a total condenser and kettle reboiler as shown in the PFD below. The pre-heater is designed to heat the process liquid prior to the feed entering above stage 10. The distillate product is cooled to 35 C. The stage 1 pressure is 2.5 bar with a 0.2 bar drop across the condenser on the process side. The bottoms pressure is 3.5 bar. Use a mass balance to set either the distillate or the bottoms flow rate and then use a design specification such that styrene with a purity of 99.95% is to be recovered in the bottoms by varying the reflux ratio. Use the NRTL method with UNIFAC for estimation Use RADFRAC to model the column Use two heater blocks and a heat stream to model the pre-heater/product cooler heat exchange Ignore pressure drops in the heater blocks What is the temperature of the feed entering the column in oC?    __     _________________ What is the duty of the product cooler/pre-heater in GJ/hr?  _____         ______________ What is the reflux ratio required to achieve the desired product purity?   ________________ What is the energy consumption in the reboiler in GJ/hr for 99.95% pure styrene?_____           ___________________ What is the diameter in meter for this column if sieve trays with 4 tray passes and default tray spacing are used? ___       _______________

ISIQEPHU A   IQINISO LIYABABA UMBUZO 1 Funda indatshana elandelayo bese uphendula imibuzo ezolandela. RIGHT CLICK ON THE BUTTON BELOW TO OPEN ISIQEPHU A IN A NEW TAB  

12. Intermittent fasting can be appropriate for weight loss in the general population EXCEPT for:  

Questions 14-23. Based on information discussed in class, indicate whether the following dietary changes and  its respective biological effect to lower the risk of cardiovascular disease (CVD) are true or false. (Select A = True; Select B = False)  

10. Which nutrient (s) may help prevent cardiovascular disease by functioning as an antioxidant in the cell  membrane?

43. The following physiological/metabolic events are most likely to occur on a ketogenic diet EXCEPT:

When considering precedent transactions, which question(s) would an investment banker typically ask to better understand the context of an M&A deal? Check ALL that apply:

Assume that a financial sponsor paid 2,400m total to purchase a business (in other words, the entry enterprise value was 2,400). The deal was financed with debt of 5.6x LTM EBITDA. LTM EBITDA at entry was 300 million. The total debt repaid over the holding period (3 years) is $360 million. The business is expected to be sold at the end of year 3 for an enterprise value of 3,000 million. What is the IRR? Express your answer as a percentage and round to the nearest tenth decimal place. For example, if your answer is 10.3%, then input “10.3”

AFDELING B VRAAG 2   2.1 Lees die onderstaande teks en beantwoord die vrae wat volg:      Met verloop van tyd het tegnologie verbeter. Baie meer kan ontdek word of in meer diepte bestudeer word. In 1610 het Galileo sy teleskoop na die hemelruim gedraai. In 1990 is die Hubble-ruimte teleskoop die ruimte ingestuur. Vandag is daar al meer as 350 000 foto’s geneem van voorwerpe in die hemelruim. Hierdie voorwerpe kan nou in diepte bestudeer word.     

Lees die volgende instruksies noukeurig voordat jy die vrae beantwoord:  1.       Die antwoorde wat jy verskaf, moet jou eie, oorspronklike werk wees. Geen kopiëring van enige bron word toegelaat nie. Geen punte sal toegeken word vir werk wat gekopieer word nie.  2.       Lees al die vrae noukeurig.  3.       Beantwoord AL die vrae in die vasvra – moenie enige vrae onbeantwoord laat nie en moenie jou antwoorde op papier skryf nie.  4.       Gebruik die puntetoekenning as ‘n gids tot hoeveel inligting in jou antwoorde benodig word.  5.       Slegs hand getekende diagramme, vloeikaarte of tabelle op ‘n aparte stuk papier wanneer gevra word om dit te doen.  6.       Alle tekeninge moet in potlood gedoen word en in blou of swart ink gemerk word.  7.       Die diagramme in hierdie vraestel word nie noodwendig op skaal getrek nie.  8.       Jy kan ‘n sakrekenaar gebruik indien nodig.