Question

Which among the following is always true for mass transfer to occur?

(a) Difference in concentration

(b) Difference in Pressure

(c) Difference in temperature

(d) Difference in chemical potential

I had been asked this question by my school principal while I was bunking the class.

I'm obligated to ask this question of Concentration and Velocity topic in portion Modes and Diffusion of Mass Transfer

Answer 1

Right answer is (d) Difference in chemical potential

To explain: Mass transfer occurs to attain an equilibrium position or to minimize the energy of the system. Mass occur can occur even if there is no difference in concentration, pressure and temperature. Example: – A ball rolls down a slope to minimize its potential energy.