THE STANDARD MOLAR GIBBS FREE-ENERGY OF FORMATION OF SRMOO3(S)

DELTA(f)G(m)o(SrMoO3,s,T) was obtained by measuring Sr(g) pressures over the mixture (SrMoO3(S)+Mo(S)+ Cr(s)+Cr2O3(S)) in the temperature range 1185.5-1370.0 K and is given by the equation DELTA(f)G(m)o(SrMoO3,s,T) (kJ mol-1)+/-0.6= -1290.3+0.2927T (K). Using the relevant heat capacity and entropy data from the literature and the variation of DELTA(f)G(m)o(T) with temperature and C(p) of SrMoO3(s) from the present work, the values of DELTA(f)H(m)o(298.15 K) and S(m)o(298.15 K) were calculated to be -(1294.6+/-3.6) kJ mol-1 and (84.2+/-2.8) J K-1 mol-1 respectively.