Calculate the Standard Enthalpy of Formation of Cl^-(aq),given the Following

question 11

Multiple Choice

Calculate the standard enthalpy of formation of Cl^-(aq) ,given the following thermochemical data at 1 atm,and knowing that the standard enthalpies of formation of H₂(g) and H⁺(aq) are both zero.
HCl(g) → H⁺(aq) + Cl^-(aq) Δ_rH° = -75.15 kJ/mol
H₂(g) + Cl₂(g) → 2HCl(g) Δ_rH° = -184.62 kJ/mol

• A)-167.46 kJ/mol
• B)+109.47 kJ/mol
• C)-17.16 kJ/mol
• D)+34.32 kJ/mol
• E)+ 167 kJ ?mol

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