Question

The humidity at dry-bulb temperature of 20^oC is 10% and the humidity at dry-bulb temperature of 23^oC is 4%, what is the slope of adiabatic cooling line?

(a) -0.01

(b) -0.02

(c) -0.03

(d) -0.05

This question was posed to me in examination.

The query is from Degrees of Freedom Analysis in Steady-State Process in chapter 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 (b) -0.02

For explanation I would say: Slope of adiabatic cooling line = (0.1 – 0.04)/(20 – 23) = -0.02.