Question

What is r value in pV= nRT?

(a) 0.8314 J/mol•K

(b) 831.4 J/mol•K

(c) 83.14 J/mol•K

(d) 8.314 J/mol•K

This question was posed to me at a job interview.

This question is from Distillation topic in chapter Distillation of Food Processing Unit Operations

Answer 1

Right choice is (d) 8.314 J/mol•K

For explanation: The ideal gas law is pV = nRT, where n is the number of moles, and R is universal gas constant. The value of R depends on the units involved, and S.I. unit is 8.314 J/mol•K.