ANSWERS: 2
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I believe 3
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According to Coulomb's law all bonds arise from the attraction of unlike charges. So in this case the bond requires [energy] called "enthalpien"--if I can recall correctly--which means "warm" in Greek term. This energy is also commonly called "heat content". Now, in my studies in Industrial Technology this classes caused me a lot of headaches and didn't do as good as I should have had; so to make sure maybe you want to re-check.
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