Question

The humidity at dry-bulb temperature of 23^oC is 30% and the humidity at dry-bulb temperature of 28^oC is 25%, what is the slope of adiabatic cooling line?

(a) -0.01

(b) -0.02

(c) -0.03

(d) -0.05

The question was posed to me in an interview.

The origin of the question is Degrees of Freedom Analysis in Steady-State Process in portion Humidity Charts & their Use, Analysis of the Degrees of Freedom in a Steady – State Process, Solving Material and Energy Balances Using Process and Unsteady State Material and Energy Balances of Basic Chemical Engineering

Answer 1

Right option is (a) -0.01

Best explanation: Slope of adiabatic cooling line = (0.3 – 0.25)/(23 – 28) = -0.01.