The calorific value of a gas of composition CO2 = 20%, H2 = 50%, CH4 = 30%, is y. If the composition of gas is changed to H2 = 50%, CH4 = 30%, CO2 = 10%, N2 = 10%, then the calorific value will be___________________?

Correct answer: A. y

A. y
B. 0.95 y
C. 1.05 y
D. 1.8 y

Explanation

The calorific value depends only on the combustible H2 and CH4 fractions, which remain 50% and 30% in both gas compositions. Replacing 10% CO2 with inert N2 does not change the heating value per unit gas volume, so it remains y.

Written and checked by Zahid Hussain, MS Computer ScienceLast updated 18 September 2026

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The calorific value of a gas of composition CO2 = 20%, H2 = 50%, CH4 = 30%, is y. If the composition of gas is changed to H2 = 50%, CH4 = 30%, CO2 = 10%, N2 = 10%, then the calorific value will be___________________?

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