Question: An uninsulated, 25-mm-diameter pipe with a surface temperature of 15C passes through a room having an air temperature of 37C and relative humidity of 75%.

An uninsulated, 25-mm-diameter pipe with a surface temperature of 15°C passes through a room having an air temperature of 37°C and relative humidity of 75%. Estimate the condensation rate per unit length of the pipe assuming film, rather than drop wise, condensation.

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