batch of green lumber is dried by passing air at 50 degree C dry-bulb and 20 degree C wetbulb over it in an unheated evaporation booth. The lumber decreases in mass at the rate of 2.6 kg/h. The air leaving the dryer is at 80% relative humidity. Most nearly, what is the incoming air volume

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A: Taking.

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A: Write the expression for heat flux as follows: QA = -k∆T∆xQA = -kTo-TIx      .....1