Upon combusting a small sample of lactic acid, you observe that 2450 kJ energy is released. Calculate the heat of combustion of lactic acid. How many moles of lactic acid were in your sample? 1....

Upon combusting a small sample of lactic acid, you observe that 2450 kJ energy is released. Calculate the heat of combustion of lactic acid. How many moles of lactic acid were in your sample?

1. Escherichia coli is a type of bacteria that, depending on the strain, either lives in the human digestive tract without any adverse effect or causes severe illness in humans. A researcher wishes to grow a particular strain of E. coli (overall formula CH1.77O0.49N0.24) in a bioreactor for protein production. At 5 kg/hr, glycerol (C3H8O3) is the limiting reactant. Reaction products are constantly being removed to keep reactor conditions constant.

How much heat needs to be removed from the bioreactor to keep it at a constant temperature? Assume that the heat of combustion of E. coli is -22.83kJ/g and the respiratory quotient is 0.44. Assume that the enthalpy changes required to raise and lower the temperature of compounds are negligible relative to ∆H°r.