Label each of the following reactions as exothermic or endothermic ("exo" or "endo"), and according to whether work is done on or by the system, or no work is done at all ("on", "by" or "none")? Note that no "endo-on" cases appear here, as these are always thermodynamically unfavourable. There is no need to do any calculation, use chemical arguments to predict the sign of the enthalpy change. N2(g) --> N2(1)

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Chapter1: Chemical Foundations
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Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Label each of the following reactions as exothermic or endothermic ("exo" or "endo"),
and according to whether work is done on or by the system, or no work is done at all
("on", "by" or "none")? Note that no "endo-on" cases appear here, as these are always
thermodynamically unfavourable. There is no need to do any calculation, use
chemical arguments to predict the sign of the enthalpy change.
N2(g) --&gt N2(1)
NH3(g) + HF(g) --&gt
NH4F(s)
1. ехо-on
HBr(aq) + KOH(aq) --&gt
KBr(aq) + H2O
2. exo-none
3. еxо-by
Mg(s) + 2HCI(aq) --&gt
MgCl2(aq) + H2(g)
S(s) + 3/2 O2(g) --&gt
SO3(8)
1
>
>
Transcribed Image Text:Label each of the following reactions as exothermic or endothermic ("exo" or "endo"), and according to whether work is done on or by the system, or no work is done at all ("on", "by" or "none")? Note that no "endo-on" cases appear here, as these are always thermodynamically unfavourable. There is no need to do any calculation, use chemical arguments to predict the sign of the enthalpy change. N2(g) --&gt N2(1) NH3(g) + HF(g) --&gt NH4F(s) 1. ехо-on HBr(aq) + KOH(aq) --&gt KBr(aq) + H2O 2. exo-none 3. еxо-by Mg(s) + 2HCI(aq) --&gt MgCl2(aq) + H2(g) S(s) + 3/2 O2(g) --&gt SO3(8) 1 > >
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