A.NH4Cl | B.Na2CO3 |
C.HOCH2CH2OH | D.HOCH2CH2NH2 |
A.CH3OH(l)+ 3/2O2(g)=CO2(g)+ 2H2O(l);△H="+725.8" kJ·mol-1 |
B.2CH3OH(l)+ 3O2(g)= 2CO2(g)+ 4H2O(l);△H="-1452" kJ·mol-1 |
C.2CH3OH(l)+ 3O2(g)= 2CO2(g)+ 4H2O(l);△H="-725.8" kJ·mol-1 |
D.2CH3OH(l)+ 3O2(g)= 2CO2(g)+ 4H2O(l);△H="+1452" kJ·mol-1 |
A.该反应放出251.2 kJ的热量 | B.该反应吸收251.2 kJ的热量 |
C.该反应放出125.6 kJ的热量 | D.该反应吸收125.6 kJ的热量 |
A.a < b | B.a = b |
C.a > b | D.无法确定 |
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