欲使 CaCO 3 (s) 在标准压力下分解为 CaO(s) 和 CO 2 (g) ,最低温度为多少? ( 假设 ΔfHmΘ及ΔSΘ 不随温度变化而变化 ) 已知: ΔfHmΘ= (CaCO 3, s) = -1206.90 kJ · mol -1 ΔfHmΘ= (CaO, s) = -635.55 kJ · mol -1 ΔfHmΘ= (CO 2 , g) = -393.50 kJ · mol -1 SΘ= (CaCO 3 , s) = 92.9 J · mol -1 · K -1 SΘ= (CaO, s) = 39.8 J · mol -1 · K -1 SΘ= (CO 2 , g) = 213.6 J · mol -1 · K -1