Mass Transfer
One mole feed of a binary mixture of a given composition is flash vaporised at a fixed P and T. If Raoult's law is obeyed, then changing the feed composition would effect

The product composition as well as the fraction vaporised
The fraction vaporised but not the product composition
Neither the product composition nor the fraction vaporised
The product composition but not the fraction vaporised

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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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