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Enthalpy Calculation Exercises for a Gaseous Mixture

Solve enthalpy-related exercises involving a gaseous mixture's reactions at specified conditions using Hess's Law and calculate various thermodynamic parameters.

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Enthalpy Calculation Exercises for a Gaseous Mixture

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  1. ENTALPHY-GASEOUS MIXTURE -EXERCISE • 22 g of a gaseousmixturecomposed of CH4and O2gaseshaving a volumeratio as , goesintoreactions as describedbelow at 1 atmand 25°C . As a result, CO(g) and H2(g) areformed. CH4(g) + 2 O2(g) CO2(g) + 2 H2O(g) ΔH= - 802kJ/mol • CH4(g) + CO2(g) 2 CO(g) + 2 H2(g) ΔH= + 206 kJ/mol • CH4(g) + H2O(g) CO(g) + 3 H2(g) ΔH= + 247 kJ/mol • a) Using theHess’slaw,calculatetheenthalpychange of the net reaction CH4(g) + ½ O2(g) CO(g) + 2 H2(g) b) Calculatethechange in theinternalenergy of thesystem in (kJ) ΔU=? c) Calculatethework done on/bythesystem in kJ d) Calculatetheheatproduced/givenoffby/tothesurrounding e) Calculatethepartialpressure of H2(g) f) Calculatetheentropychange of thesystem. Comment on whichconditionsthe net reaction is spontaneous (C=12 ; H=1 ; O=16 g/mol)

  2. HESS YASASI • I. C(grafit) + ½ O2(g) CO(g) ΔH= - 110,5 kJ • II. CO(g) + ½ O2(g) CO2(g) ΔH= - 283 kJ • III. H2(g) + ½ O2(g) H2O(s) ΔH= - 285,8 kJ • IV. C(grafit) + 2 H2(g) CH4(g) ΔH= -74,81 kJ Tepkimelerinden yararlanarak 4 CO(g) + 8 H2(g) 3 CH4(g) + CO2(g) + 2 H2O(s) ΔH=? Net tepkimesinin entalpi değerini hesaplayın

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