TREBUIE sa aflu cate m³ sunt in masa de metan pur
-calculez masa de metan ,CH4,pur
p/100=m,p/m,i
96/100=m,p/m,i---> m,pur=1,92kg
-calculez volumul corespunzator acestei mase
n= m/M= V/Vm M= 16kg/kmol Vm= 22,4m³/kmol
1,92/16= V/22,4----> V=2,688m³
-calculez caldura degajata la arderea acestui volum
1m³.........9463,68kcal
2,688m³...........x.................................calculeaza kcal !