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+//ques-22.16
+//Calculating lattice energy of KCl crystal
+clc
+S=90.9; IE=418.7; EA=-348.7; D=240; H=-440.3;//(in kJ/mol)
+Uo=H-S-IE-D/2-EA;
+printf("The lattice energy of KCl crystal is %.1f kJ/mol.",Uo);