Born- Hyber cycle below respesents the energy changes occurring as 298K, jwhen MO(s) is formed from its elements, wherx x, y,z, a, b,c and d are enthalpy change elements, for corresponding pro0cesses respectively DeltaH_("sub")"of" M=180kJ//mol I.E_(1)(M)=218kJ//mol I.E_(2)(M)=384kJ//mol DeltaH_("atomisation")"of" O_(2)=640kJ//mol DeltaH(OrarrO^(-))=-142kJ//mol DeltaH(OrarrO^(-2))=-844kJ//mol In terms of x,y,z,a,b, c and d enthalpy change for the reaction, 2M(s)+O_(2)(g)rarr2MO(s),is:

Born- Hyber cycle below respesents the energy changes occurring as 298

1.	Born- Hyber cycle below respesents the energy changes occurring as 298K, jwhen MO(s) is formed from its elements, wherx x, y,z, a, b,c and d are enthalpy change elements, for corresponding pro0cesses respectively DeltaH_("sub")"of" M=180kJ//mol I.E_(1)(M)=218kJ//mol I.E_(2)(M)=384kJ//mol DeltaH_("atomisation")"of" O_(2)=640kJ//mol DeltaH(OrarrO^(-))=-142kJ//mol DeltaH(OrarrO^(-2))=-844kJ//mol In terms of x,y,z,a,b, c and d enthalpy change for the reaction, 2M(s)+O_(2)(g)rarr2MO(s),is:
Answer» `2x+2y+2z+2a+2b+2c+2d` `x+y+z+a+b+c+d` `2x+2y+z+2a+2b+2c+d` `2x+2y+2z+2a+2b+2c-2d` ANSWER :a