Chemical Engineering - Mass Transfer - Discussion

Discussion Forum : Mass Transfer - Section 8 (Q.No. 43)
43.
Air at a particular humidity is heated in a furnace. The new dew point
decreases
increases
depends on the extent of heating
remain unchanged
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
2 comments Page 1 of 1.

Angelin said:   4 years ago
@Suraj.

When temperature increases the relative humidity decreases.
(1)

Suraj said:   5 years ago
In a furnace total pressure is assumed to be constant.

When total pressure is constant equilibrium partial pressure of vapour in the air is unique funnction of temperature.

When temperature increases partial pressure increases.

Relative humidity increases on increasing partial pressure. And from humidity chart we can clearly observe that when relative humidity increases with increase in temparature it leds to increase in dew point.

(Dew point is temparature at the point when constant humidity line intersects with saturation curve).

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