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【单选题】
已知由H2 (g)和N2 (g)制备0.1 mol NH3(g)焓变为-4.61kJ,试估计该过程的内能变为( )A.
-4.36kJ
B.
-43.6kJ
C.
-2.13kJ
D.
-21.3kJ
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