A.常温时,中性溶液的pH=7,AG=0 |
B.酸性溶液的AG>0,AG越大,溶液的pH越小 |
C.碱性溶液的AG>0,AG越大,溶液的pH越大 |
D.常温下,0.1 mol/LNaOH溶液,AG=-12,pH=13 |
A.乙炔的燃烧热为1256kJ/mol |
B.若生成2mol 液态水,则放出的热量小于2512kJ |
C.若形成4mol碳氧共用电子对,则放出的热量为2512kJ |
D.若转移10mol电子,则消耗2.5molO2 |
A.H2(g)+1/2O2(g)===H2O(g)ΔH =—a1 kJ/mol |
B.H2(g)+CuO(s)===Cu+H2O(l)ΔH =-a2 kJ/mol |
C.2H2(g)+O2(g)===2H2O(l)ΔH =-a3 kJ/mol |
D.H2(g)+1/2O2(g)===H2O(l)ΔH =-a4 kJ/mol |
A.①④ | B.①② | C.②③ | D.③④ |
A.CaCO3 | B.CH3COONa | C.NH3 | D.Na2SO3 |
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