The Standard Enthalpy of Formation of NaCl(s)is -411 KJ/mol

question 27

Multiple Choice

The standard enthalpy of formation of NaCl(s) is -411 kJ/mol.In a Born-Haber cycle for the formation of NaCl(s) ,which enthalpy change(s) is/are endothermic?

• A)the lattice enthalpy of NaCl(s)
• B)the electron affinity of chlorine
• C)the reverse of the lattice enthalpy of NaCl(s)
• D)All of the enthalpy changes are endothermic except for the standard enthalpy of formation of NaCl(s).

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