26. Solving a chemistry problem
1. Determine the calorific value of ethylene C2H4 3O2=2CO2 2H2O(l) Q from the following data
2C(gr) 2H2=C2H4-62.01 kJ/mol
C(gr) O2=CO2 393.9 kJ/mol
H2 1/2O2=H2O(l) 284.9 kJ/mol
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