问题
选择题
已知:
2CO(g)+O2(g)=2CO2(g) △H= -566 kJ/mol
N2(g)+O2(g) =2NO(g)△H=+180 kJ/mol
则2CO(g)+2NO(g)=N2(g)+ 2CO2(g)的△H是[ ]
A.-386 kJ/mol
B. +386 kJ/mol
C. -746 kJ/mol
D. +746 kJ/mol
答案
答案:C
已知:
2CO(g)+O2(g)=2CO2(g) △H= -566 kJ/mol
N2(g)+O2(g) =2NO(g)△H=+180 kJ/mol
则2CO(g)+2NO(g)=N2(g)+ 2CO2(g)的△H是[ ]
A.-386 kJ/mol
B. +386 kJ/mol
C. -746 kJ/mol
D. +746 kJ/mol
答案:C