Question

What is the basic formula for calculating GCV in Boy’s calorimeter?

(a) GCV = w(t2+t1)/V

(b) GCV = w(t2-t1)/V

(c) GCV = V(t2+t1)/w

(d) GCV = V(t2-t1)/w

I got this question during an interview.

This interesting question is from Determination of Calorific Value of Gaseous and Volatile Liquid Fuels topic in chapter Fuels and Combustion of Engineering Chemistry II

Answer 1

Correct choice is (b) GCV = w(t2-t1)/V

For explanation I would say: In this (t2-t1) is the rise in temperature of the water which is multiplied to its weight and divide by the volume of gas burned at standard conditions of temperature and pressure. Its unit is in cal/m^3.