Chapter 4, Problem 4.1P

A temperature difference drives a heat transfer Does a similar concept apply to $\stackrel{\dot{}}{m}$ ?

To determine

The similar concept for mass transfer like the heat transfer derived by the temperature difference.

Answer to Problem 4.1P

Mass transfer is derived by pressure difference.

Explanation of Solution

The temperature difference between two regions can lead to transfer of heat from high temperature region to lower temperature region to maintain the equilibrium of temperature between two regions.

The similar concept can be applied to the mass transfer, for instance if we consider a pipe having water flow inside it, the flow of water starts from high pressure region and flow to the lower pressure region.

The flow inside the pipe is due to the pressure difference. As water is incompressible fluid thus its density will remain same throughout the flow. Hence, the mass transfer is derived by Pressure difference.

Conclusion:

Thus, mass transfer is derived by pressure difference.