Question

If the feed temperature is 211^oK and Dew point is 70^oF, then tn is

(a) 68^oF

(b) 178^oF

(c) 140.5^oF

(d) 259.5^oF

I had been asked this question in final exam.

The question is from Analysis of Existing Columns with Brinkley Method topic in portion Column Process Design, Optimization and Shortcut Calculations of Distillation Design

Answer 1

Right answer is (c) 140.5^oF

To elaborate: As tn= (70+211)/2 = 140.5^oF.