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Correct equations using energy
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Topic: Correct equations using energy (Read 1179 times)
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Ilikebugs
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Correct equations using energy
«
on:
April 24, 2019, 06:45:02 PM »
Which of the following equations is not correct?
A| H2 (g) -> 2H (g) + energy
B| Na(g) + e - -> Na-(g) + energy
C| Mg(g) + energy -> Mg 2+ (g) + 2e -
D| Cu(s) + energy -> Cu(l)
E| Na + (g) + Cl - (g) -> NaCl(s) + energy
I don't see any problem with them where energy is on the left for decomposition and on the right for synthesis, is there no energy needed to change the state of copper perhaps?
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Mitch
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Re: Correct equations using energy
«
Reply #1 on:
April 24, 2019, 11:32:03 PM »
Does A look right to you?
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Ilikebugs
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Re: Correct equations using energy
«
Reply #2 on:
April 25, 2019, 09:30:34 PM »
Oh, is A wrong because it decomposes but it outputs energy?
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Enthalpy
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Re: Correct equations using energy
«
Reply #3 on:
April 26, 2019, 05:36:34 AM »
The
atomization
of H
2
absorbs energy.
I've seen "decomposition" said from other reactions, like acetylene producing soot and gases, which does release energy, boom.
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Correct equations using energy