Consider the single equilibrium stage

process shown below $-$

$3\mathrm{.}1$ Write out a general material balance expression for an arbitrary control volume accounting

for accumulation of species in the control volume and consumption of species within the

control volume through a reaction. You can write this expression in words or in equation

form considering either mass flow or molar flow.

$3\mathrm{.}2$ For the single equilibrium stage process shown above, assume there is no accumulation or

reaction within the control volume. The mass flowrates are represented as $m_{x_y}.$ The molar

mass of phase $1$ is $M_1$ and that of phase $2$ is $M_2.$ A small amount of material is being

transferred from phase $1$ to $2.$ Write a material balance for the system shown above in terms

of mass flow and in terms of molar flow.