Calculate the average H-S bond enthalpy in H₂S(g) given the standard enthalpies of formation for H₂S(g),H(g),And S(g):-20.1,218,And 223kJ.mol^-¹ ,Respectively. A) 340 kJ.mol^-¹ B) 231 kJ.mol^-¹ C) 10.1 kJ.mol^-¹ D) 679 kJ.mol^-¹ E) 461 kJ.mol^-¹

Question

Quizplus · Accepted Answer

The average bond enthalpy can be calculated by subtracting the standard enthalpy of formation of H₂S(g) from the sum of the standard enthalpies of formation of the constituent atoms H(g) and S(g) multiplied by the number of bonds broken: Average Bond Enthalpy = [Σ(Enthalpy of formation of constituent atoms) - Enthalpy of formation of H₂S(g)] / (Number of Bonds Broken) In this case, we need to break three H-S bonds: Average Bond Enthalpy = [3(218 kJ/mol) + 223 kJ/mol - 1020.1 kJ/mol] / 3 = 340 kJ/mol Therefore, the best choice is A.

Calculate the Average H-S Bond Enthalpy in H2S(g) Given the Standard

Calculate the Average H-S Bond Enthalpy in H₂S(g) Given the Standard