Two moles of hydrogen H2 and one mole of oxygen O2 enter a combustion chamber at 25°C and 1 atm, combustion occurs, and the H2O which is formed exits at 627°C and 1 atm. The heat transfer from the combustion chamber is nearest:

A) 440 MJ
B) 410 MJ
C) 320 MJ
D) 230 MJ


A) 440 MJ

The combustion equation is 2H2 +O2 ?2H2O



The minus sign indicates that heat leaves the combustion chamber so the heat from the chamber is 439 800 kJ.

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