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Find the time, in hours, required for the evaporation of 10 grams of 15 grams of spherical naphthalene particles suspended in a large air at rest under 45 °C and 1.01325 bar pressure. Under the given conditions, the diffusion coefficient of naphthalene is 6.92 × 10⁻⁶m²s⁻¹, its density is 1140 kg m⁻³, the sublimation pressure at 45 °C is 0.8654 mmHg and the molar weight of naphthalene is 128 kg kmol-1. (1 atm = 1.01325 bar)

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