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leva [86]
3 years ago
7

3h2(g)+o3(g) 3h20(g) arrow after the o3(g)whats the overall enthalpy?

Chemistry
1 answer:
Dmitry_Shevchenko [17]3 years ago
8 0

The overall enthalpy of reaction will be calculated from enthalpy of formation of products and reactants.


DeltaHrxn = [Sum of enthalpy of formation of products] - [sum of enthalpy of formation of reactants]

DeltaHrxn = 3 X deltaHf (H2O) - [ 3 X DeltaH (H2) + DeltaH (O3)]

DeltaHrxn =  3 X (--242) - [ 0 + 143] = -869 kJ / mole


We can also calculate the enthalpy of reaction from bond energies


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