Mass transfer experiments have been conducted on a naphthalene cylinder of 18.4-mm diameter and 88.9-mm length subjected
Question:
Mass transfer experiments have been conducted on a naphthalene cylinder of 18.4-mm diameter and 88.9-mm length subjected to a cross flow of air in a low-speed wind tunnel. After exposure for 39 min to the airstream at a temperature of 26°C and a velocity of 12 m/s, it was determined that the cylinder mass decreased by 0.35 g. The barometric pressure was recorded at 750.6 mm Hg. The saturation pressure Psat of naphthalene vapor in equilibrium with solid naphthalene is given by the relation Psat = P x 10E, where E = 8.67 - (3766/1), with T (K) and P (bar) being the temperature and pressure of air. Naphthalene has a molecular weight of 128.16 kg/kmol.
(a) Determine the convection mass transfer coefficient from the experimental observations.
(b) Compare this result with an estimate from an appropriate correlation for the prescribed flow conditions.
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KNOWN Mass change for a given time period of a solid naphthalene cylinder subjected to cross flow of air for prescribed conditions FIND a Mass transfe...View the full answer
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