Question

Problem Page Using the table of standard formation enthalpies that you'll find under the ALEKS Data tab, calculate the reaction enthalpy of this reaction under standard conditions:

C2H2(g) + 2H2(g) → C2H6(g) Round your answer to the nearest kJ

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Answer 1

We know- A1 = Enx thị (products - Enx AHİ (reactanks) The reaction is C2H₂ (8) + 2 H₂C8) C2H6 (8) .: Hesen = [1x 4H(CHc)] – [fix44(<2 4x)}+{2x 44; C H2)}]

from table- A Hf of C₂H₂ (8) = 227 ks mol 4 Hof Of Cz HG (8)= -84.7 kJ/mol A Hf of H₂ (8) = 0 kJ/mol

Accondingly, Ahram = [x arj (C2Hc)]-[{1x4#<<> )}+{2x quj (»}] = [ix(+84.7)] - [{1x 227} + { 2x0}] = - 84.7 - [227 +0] = (- 84.7 - 227) KIJmol = - 311.7 kJſmos. u. A Horan is - 311.7 kJ/mol. Am.