Calculate the t90 (shelf-life) for your unknown at 70 °C assuming the activation energy, Ea, for the process is 105 kJ/mol. Show all work. Symbolically state the equations you are using defining all variables and constants. (Hint, the material in U5 M3 under "Temperature Effects" may prove useful).Given:R = 0.008314K1 = 5 E-08T1 = 70 °C = 273.16 KT2 = 24 °C = 297.15 KEa = 73 kJ/mol

Liquid from a brewery fermentation contains 10% ethanol and 90% water. part of the fermentation product (50,000 kg/h) is pumped to a distillation column on the factory site. under current operating conditions, a distillate of 45% ethanol and 55% water is produced from the top of the column at a rate of one-tenth that of the feed. what is the composition of the waste "bottoms" from the still?