Ethylene oxide $(A)$ is reacted with water $(B)$ in a continuously stirred tank reactor $($CSTR$)$ to form

ethylene glycol $($P$).$ Assume that the CSTR is maintained at a constant temperature and that the water

is in large exeess. The stoichiometric equation is

$A+BP$

The reaction is assumed to be irreversible and of first order. Develop a model to find the concentration

of each species as a function of time.