The ionization enthalpy of Na+ formation from Na is 495.8 kJ mol-1 , while the electron gain enthalpy of Br is -325.0 kJ mol-1 . Given the lattice enthaply of NaBr is -724.4 kJ mol-1 . The energy for the formation of NaBr ionic solid is (-) _________
Option: 1 5576
Option: 2 -
Option: 3 -
Option: 4 -
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