Given the following list of standard state formation reactions, rearrange the ap

Question

Given the following list of standard state formation reactions, rearrange the appropriate ones in order to determine the AH° for the target reaction listed. Use only the equations that you need. Known Standard Enthalpy of Formation Reactions For Reference: C (graphite) + O2 (g)- CO2 (g) H2 (g) + ½ O2 (g)--H2O (g) H2 (g) + ½ O2(g)- H20 (1) 2 C (graphite) + 3 H2 (g)-C2H6 (g) 3C (graphite) + 4 H2 (g)- CM (g) 4C (graphite) + 5H2 (g)-GH10 (g) 0-393.51k/mol AH-241.8 kJ/mol Hfo=-285.83 kJ/mol am,o=-84.68 kirnol 4°=-103.85 kirnol 4°=-126.15 kimol Target Reaction 2 C4H10 (g) + 132 (g) 8 CO2 (g) + 10 H2O (1) kJ/mol reaction

Explanation / Answer

Let us start by numbering the reactions given in the question from 1 to 6.

Now the reactions can be rearranged and multiplied by a suitable factor to get the target reaction.

Add reactions : ( reaction 1 multiplied by 8) + (Reaction 3 multiplied by 10) + ( reverse of reaction 6 , multiplied by 2)

So the enthalpy of the target reaction will be :

= 8(-393.51) + 10(-285.83) + 2(+126.15)

= -5754.08 KJ / mol

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