Yeast Fermentation Paper

Newly produced beer must be checked to see if it meets predetermined standards. The percentage of alcohol is determined by distillation. A set of measurements is listed forone batch.Sample Volume of beer (L) Ethanol distilled (mL)1               8.00                         3922              10.00                          5003              9.00                            4594             9.00                           444 What is the average percentage by volume of ethanol for this batch?

NHẠNO3 MgSO4 [1] Mass of salt (g) 1.968 1.981 [2] Volume of DI water (mL) 50.0 50.0 0.039 0.0396 Mass of DI water (g) [3] Temperature of DI water (°C) 22.5 22.5 [4] Temperature of mixture after dissolution (°C) 19.5 27.1 3 4.6 Temperature difference (°C) [5] Total mass in reaction (g) [6] Enthalpy of solution AHsolution (cal/mol)

Predict whether A S for each reaction would be greater than zero, less than zero, or too close to zero to decide.

The Joule (J) is the SI unit of energy. 1 calorie (cal) = 4.184 J; 1 kcal = 1000 cal J kJ kcal 504       0.468       0.167

Ethanol, C2H6O, is most often blended with gasoline - usually as a 10 percent mix - to create a fuel called gasohol. Ethanol is a renewable resource and ethanol-blended fuels, like gasohol, appear to burn more efficiently in combustion engines. The heat of combustion of ethanol is 326.7 kcal/mol.The heat of combustion of 2-methylhexane, C7H16, is 1.150×103 kcal/mol. How much energy is released during the complete combustion of 452 grams of 2-methylhexane ?Assuming the same efficiency, would 452 grams of ethanol provide more, less, or the same amount of energy as 452 grams of 2-methylhexane?

As part of the aspirin synthesis lab the orgo students also had to perform the following calculation to demonstrate their knowledge. Are you able to help them work this out? Saponification is a process in which soap is produced from the chemical reaction between animal fat (triglycerides) and a strong base such as KOH. An example of such balanced chemical reaction is shown here: C51H98O6 +   3KOH   → C3H5(OH)3   +   3C16H31O2K                           (Triglyceride)                                                      (Soap) if during the saponification reaction 231.5 g of C51H98O6  is mixed with 231.5 g of KOH and 160 g of soap is produced. Calculate the theoretical yield of soap C16H31O2K and indicate who is the limiting reactant. (Provide your answer to 2 decimal places) Calculate the percent yield for this reaction (Provide your answer to 1 decimal place)   *Show ALL steps and mathematical equations involved in your calculations to help the orgo students. Remember to label all…