A.2H2(g)+O2(g) ="=" 2H2O(1)△H= ―285.8kJ/mol |
B.2H2(g)+ O2(g) ="=" 2H2O(1)△H= +571.6 kJ/mol |
C.2H2(g)+O2(g) ="=" 2H2O(g)△H= ―571.6 kJ/mol |
D.H2(g)+O2(g) ="=" H2O(1)△H= ―285.8kJ/mol |
A.该反应是吸热反应 |
B.使用催化剂后反应热减小 |
C.热化学方程式为CO(g)+2H2(g) → CH3OH(g) + 510 kJ |
D.热化学方程式为CO(g)+2H2(g) → CH3OH(g) + 91 kJ |
A.a>b>c | B.a<b<c | C.b<c<a | D.b>c>a |
A.196.64kJ | B.196.64kJ/mol | C.<196.64kJ | D.>196.64kJ |
A.x >y>z | B.x>z>y | C.y>x>z | D.z |
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