Question
Asked Nov 24, 2019
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Using the bond breaking and bond forming method, estimate the enthalpy
associated with combusting one mole of hydrogen with molecular oxygen to form water under standard conditions (1 M, 1 atm, 298 K).
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Expert Answer

Step 1

Using the bond breaking and bond forming method, the enthalpy associated with combusting one mole of hydrogen with molecular oxygen to form water under standard conditions (1 M, 1 atm, 298 K) is to be estimated.

Step 2

When a chemical reaction takes place, some bonds break and some new bonds form during that reaction. And the heat released or absorbed during bond breaking and forming process is known as the enthalpy of the reaction.

Mathematically, enthalpy of the reaction is the difference of bond energies of broken bonds and bond energies of the bonds formed.

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ΣΔΗ (bonds broken) - Σ ΔΗ (bonds formed) ΔΗ, 1Χη

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Step 3

The given reaction is – combustion of one mole of hydrogen with molecular oxygen to form water under standard conditions (1 M, 1 atm, 298 K).

During this reac...

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H,() H,O (g)H,O 2

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