What amount of heat will be released when 12 g of hydrogen is burned in oxygen
| August 4, 2021 | education
What amount of heat will be released when 12 g of hydrogen is burned in oxygen. Thermochemical equation of hydrogen combustion: 2H2 → O2 → 2H2O + 571.6 kJ
Explanation of the solution: first, you need to find the amount of hydrogen substance (divide the mass of hydrogen (12 g) by its molar mass), then you need to make a proportion based on the reaction equation: according to the reaction, when 2 mol of hydrogen is burned, 571.6 kJ of heat is released, respectively , when burning 6 mol of hydrogen, heat will be released 3 times more, that is, 571.6 * 3 = 1714.8 kJ.
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