A.2H+(aq) +(aq)+(aq)+2(aq) = BaSO4(s)+2HO(l);H =57.3 kJ/mol |
B.KOH(aq)+HSO4(aq) = KSO4(aq)+HO(l);H=57.3kJ/mol |
C.C8H18(l)+ O(g)=8CO(g)+ 9HO(g);H=5518 kJ/mol |
D.2C8H18(g)+25O(g)=16CO(g)+18HO(1);H=5518 kJ/mol |
A.—44.2 kJ·mol-1 | B.+44.2 kJ·mol-1 |
C.—330 kJ·mol-1 | D.+330 kJ·mol-1 |
A.4Q | B.5Q | C.8Q | D.16Q |
A.吸热88kJ | B.吸热2.44KJ | C.放热44kJ | D.吸热44KJ |
A.1mol H2与0.5molO2反应放出的热就是H2的燃烧热 |
B.已知C(s)+O2(g)==CO(g)△H=-110.5kJ/mol,说明碳的燃烧热为110.5kJ/mol |
C.1mol H2SO4与lmol Ba(OH)2反应生成BaSO4沉淀时放出的热叫做中和热 |
D.同温同压下,已知两个放热反应:2A(l)+B(l)="2C(g)" △H1; |
A.N2(g)+3H2(g)=2NH3(1); △H=2(a-b-c)kJ·mol-1 |
B.N2(g)+3H2(g)=2NH3(g);△H=2(b-a)kJ·mol-1 |
C.N2(g)+H2(g)=NH3(1);△H=(b+c-a)kJ·mol-1 |
D.N2(g)+H2(g)=NH3(g); △H=(a+b)kJ·mol |
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