m/ibiscms/mod/ibis/view.php?id-4801458 nt-18SP FUNDAMENTA . Buffalo State Colleg

Question

m/ibiscms/mod/ibis/view.php?id-4801458 nt-18SP FUNDAMENTA . Buffalo State College. CHEX! 3/25/2018 11:59 PM A 23.6/1003/21/2018 07:59 PM Grade -Print calculator -el Periodic Table estion 4 of 25 Sapling Learning Map For a particular isomer of CeHrs, the following reaction produces 5104.1 kJ of heat per mole of CBHue(g)consumed, under standard conditions. ." =-5104.1 kJ What is the standard enthalpy of formation of this isomer of CsHe(g)? Number kJ/ mol Tools Previous Give Up & View Solution Check Answer Net Ea 0

Explanation / Answer

Given:

Ho rxn = -5104.1 KJ/mol

Hof(O2(g)) = 0.0 KJ/mol

Hof(CO2(g)) = -393.509 KJ/mol

Hof(H2O(g)) = -241.818 KJ/mol

Balanced chemical equation is:

C8H18(g) + 25/2 O2(g) ---> 8 CO2(g) + 9 H2O(g)

Ho rxn = 8*Hof(CO2(g)) + 9*Hof(H2O(g)) - 1*Hof( C8H18(g)) - 25/2*Hof(O2(g))

-5104.1 = 8*(-393.509) + 9*(-241.818) - 1*Hof(C8H18(g)) - 25*(0.0)

Hof(C8H18(g)) = -220.334 KJ/mol

Answer: -220.33 KJ/mol

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