A.三种溶液的PH大小顺序是②>①>③ |
B.若将四种溶液稀释相同倍数,PH变化最大的是② |
C.升高相同的温度,四种溶液的PH均减少 |
D.水电离出的c(OH—):②>③>① |
|
A.CO(g)+O2(g)==CO2(g)△H =-283.0 kJ•mol—1 |
B.C(s)+ O2(g)="=CO(g)" △H = -110.5 kJ•mol—1 |
C.H2(g)+ O2(g)==H2O(g)△H = -241.8 kJ•mol—1 |
D.2C8H18O(l)+25O2(g)==16CO2(g)+18H2O(l)△H =-11828.0 kJ•mol—1 |
A.6.9~7.1 | B.4.3~9.7 | C.3.6~10.4 | D.以上都不正确 |
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