Calculate the standard enthalpy change for the reaction at 25 ∘ c. standard enthalpy of formation values can be found in this list of thermodynamic properties. c3h8(g)+ 5o2(g) ⟶ 3co2(g)+ 4h2o(g)

The standard enthalpy change for the reaction at is -2043.999kJ

Explanation:

Standard enthalpy change () for the given reaction is expressed as:

Where refers standard enthalpy of formation

Plug in all the given values from literature in the above equation:

the number of valence electrons for each molecule or ion is shown beneath the structure. remember hydrogen will not have more than two electrons. this hydrogen is part of a covalent bond (sharing two electrons). a double bond here would cause hydrogen to share four electrons with phosphorus.

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