4 (g) and AH f ° = -74kJ mol 1 C 2 H 5 OH (1) + Ba(N0 3 ) N a Mg A I Si P S Cl Ar 4 K Ca Sc Ti V Gr m F* Co Ni Cu Zn Gs □e As Se Br Kr 5 fib Sj Y Zr m Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te 1 Xe 6 Cs Ba La Hf Ta W no Os fr Pi An Hg TI Pb ft Po Al Rn 7 Fr Rd AC Large Radii 3 Ci