Four solutes are added to a solvent. All solutes have the same mass and solubility. The surface areas of four solutes are 2 mm?, 4 mm2, 6 mm?, and 10 mm2. Which solute will dissolve the quickest?
2 mm2
4 mm2
6 mm2
10 mm2

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a gas, having a molecular weight of 13 kg/kmol and a kinematic viscosity of 0.25 cm2/s, flows through a pipe 0.25 m internal diameter and 5 km long at the rate of 0.4 m3/s and is delivered at atmospheric pressure.