单选题 适中0.65 引用1 组卷70
室温下,CuSO4·5H2O(s)、CuSO4(s)与其水溶液之间转化的焓变关系如图:
已知CuSO4·5H2O(s)溶于水,溶液温度降低;CuSO4(s)溶于水,溶液温度升高。下列有关说法正确的是
已知CuSO4·5H2O(s)溶于水,溶液温度降低;CuSO4(s)溶于水,溶液温度升高。下列有关说法正确的是
A.ΔH2=ΔH1+ΔH3 |
B.1 mol CuSO4(s)的总能量大于 1 mol Cu2+(aq)与1 mol SO42-(aq)的总能量 |
C.ΔH2>ΔH1 |
D.从硫酸铜溶液中析出CuSO4·5H2O(s)的反应焓变ΔH>0 |
18-19高二·黑龙江大兴安岭地·期末
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已知将1 mol的CuSO4(s)溶于水会使溶液温度升高,将1 mol的CuSO4·5H2O(s)溶于水会使溶液温度降低。关于下列∆H的判断不正确的是
CuSO4·5H2O (s)= CuSO4(s)+5H2O(1) ∆H1
CuSO4(s)= CuSO4(aq) ∆H2
CuSO4(aq)= Cu2+(aq)+
(aq) ∆H3
CuSO4·5H2O (s)= Cu2+(aq)+
(aq)+5H2O(1) ∆H4
CuSO4·5H2O (s)= CuSO4(s)+5H2O(1) ∆H1
CuSO4(s)= CuSO4(aq) ∆H2
CuSO4(aq)= Cu2+(aq)+
CuSO4·5H2O (s)= Cu2+(aq)+
A.∆H1>∆H4 | B.∆H1>0 ∆H2<0 |
C.∆H1+∆H2+∆H3=∆H4 | D.∆H2+∆H3>∆H1 |
已知室温下,将 CuSO4·5H2O(s)溶于水会使溶液温度降低, 将 CuSO4(s)溶于水会使溶液温度升高。则下列能量转化关系的判断不正确的是
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/6/f0c65cf8-0476-46be-92a9-d98d43369bca.png?resizew=489)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/6/f0c65cf8-0476-46be-92a9-d98d43369bca.png?resizew=489)
A.∆H1>0 | B.∆H2>∆H3 | C.∆H3>∆H1 | D.∆H2=∆H1+∆H3 |
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