2.40若在100 kPa,600 ℃时,使1molNH3(g)经催化分解为单质,为了保证温度恒定需要-|||-加入热量54.39 kJ。下列各物质的摩尔定压热容为-|||-_(Pcdot m)((H)_(2),g)/(3cdot mol)-1... (k)^-1=27.2+3.8times (10)^-3J/k-|||-_(5min)=(1.5mol)cdot (({m)^-1)}^-1=30.14times 2+2.9times (10)^-3[ 7.2-2.1times (10)^-5] times (10)^-1-|||-_(Pm)((X)_(2),s);(3.molcdot (L)^-1cdot (K)^-1)=27.20+4.2times (10)^-3Ti-|||-(1)写出 Delta (H)_(m) 与T的函数关系式;-|||-(2)求25℃时的 Delta (H)_(m)