The maximum growth yield coefficient for bacillus subtilis growing on methanol is 0.4 gx/gs. the heat of combustion of cells is 21 kj/gx and for substrate it is 7.3 kcal/g. determine the metabolic heat generated by the cells per unit mass of methanol consumption.

To solve this problem, we simply have to find for the value which corresponds to a unit of unit energy per unit mass substrate. That is:

metabolic heat = 21 kJ / g X * (0.4 g X / g S)

metabolic heat = 8.4 kJ / g S

the formula mass of a molecule or a compound is the sum of the atomic weights of the atoms in its empirical formula

(that's what i know about formula mass)