1.
(2018高二上·玉田期中)
已知①碳酸钙的分解CaCO3(s)=CaO(s)+CO2(g) ΔH 1 仅在高温下自发进行;②氯酸钾的分解 2KClO3 (s)=2KCl(s)+3O2(g) ΔH 2 , 在任何温度下都自发进行,下面有几组焓变数据,其中可能正确的是( )
A . ΔH 1 =+178.32 KJ.mol -1 ΔH 2 =-78.3 kJ·mol -1
B . ΔH 1 =-178.32 kJ.mol -1 ΔH 2 =+78.3 kJ·mol -1
C . ΔH 1 =-178.32 kJ.mol -1 ΔH 2 =-78.3 kJ·mol -1
D . ΔH 1 =+178.32 kJ.mol -1 ΔH 2 =+78.3 kJ·mol -1