Use the Following Data to Determine the Standard Enthalpy Change

question 16

Multiple Choice

Use the following data to determine the standard enthalpy change for the reaction
K(g) + ½Cl₂(g)  K⁺(g) + ½Cl^-(g) at a temperature of 298.15 K. The values refer to standard enthalpy changes at this temperature.
Ionization enthalpy of potassium
_ionH^o = +418 kJ mol^-1
Enthalpy of formation of atomic chlorine
_fH^o = +121 kJ mol^-1
Electron gain enthalpy of atomic chlorine
_egH^o = -349 kJ mol^-1

• A) +190 kJ mol^-1
• B) +888 kJ mol^-1
• C) -52 kJ mol^-1
• D) +646 kJ mol^-1

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