Answer : The value of for the reaction is, -565 kJ/mol
Explanation :
The formation of sodium bromide is,
= enthalpy of the reaction
The steps involved in the reaction are:
(1) Conversion of gaseous sodium atoms into gaseous sodium ions.
= ionization energy of sodium = 496 kJ/mol
(2) Conversion of gaseous bromine atoms into gaseous bromine ions.
= electron affinity energy of bromine = -325 kJ/mol
(3) Conversion of gaseous cations and gaseous anion into solid sodium bromide.
= lattice energy of sodium bromide = -736 kJ/mol
To calculate the for the reaction, the equation used will be:
Now put all the given values in this equation, we get:
Therefore, the value of for the reaction is, -565 kJ/mol