Mass Transfer
Which of the following liquid-vapor contacting devices provides maximum contact surface area for a particular duty?

Randomly packed column
Wetted wall column
Bubble cap column
Sieve plate column

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Mass Transfer
Unsaturated air (with dry bulb temperature and dew point being 35°C and 18°C respectively) is passed through a water spray chamber maintained at 15°C. The air will be cooled

And dehumidified with decrease in wet bulb temperature
At the same relative humidity
And humidified
And dehumidified with increase in wet bulb temperature

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