Under certain conditions, evaporation of a solvent A from freshly-applied paint into air is controlled by diffusion.

Question:

Under certain conditions, evaporation of a solvent A from freshly-applied paint into air is controlled by diffusion. Assume that diffusion occurs through a thin film of stagnant air adjacent to the paint surface. The mole fraction of the solvent at a 2.5 mm distance from the paint surface is 0.08 and the mole fraction gradient is -40 m−1. Temperature and pressure are 20°C and 1 atm, respectively. The diffusivity of solvent in air is 0.091 cm2/s. Determine the mass transfer flux of the solvent at this point.

Fantastic news! We've Found the answer you've been seeking!

Step by Step Answer:

Question Posted: