reaction enthalpy Responsibility Reaction tropics (thermo-11) Think about it To you for all of them The the following Operations, whether or not in each case One Increase or One Decrease The entropy and The enthalpy of the Chemical products Systems to Expected is (z.B. ΔHoR Gt0 and so on.): CO2(s) Sublimated to CO2(g) Heating of CaCO3(s) CO2(g) + CaO(s) → CaCO3(s) H2O(s) → H2O(l) → H2O(g) → 0.5·O2(g) + H2(g) Ba(OH)2(s) + 2·NH4SCN(s) → Ba(SCN)2 + 2·NH3(g) + 2·H2O(l) NH3(g) + HCl(g) → NH4Cl(s)

  Aufgabe: thermo-11    

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Think about it To you for all of them The the following Operations, whether or not in each case One Increase or One Decrease The entropy and The enthalpy of the Chemical products Systems to Expected is (z.B. ΔHoR Gt0 and so on.):

1. CO₂(s) Sublimated to CO₂(g)
2. Heating of CaCO₃(s)
3. CO₂(g) + CaO(s) → CaCO₃(s)
4. H₂O(s) → H₂O(l) → H₂O(g) → 0.5·O₂(g) + H₂(g)
5. Ba(OH)₂(s) + 2·NH₄SCN(s) → Ba(SCN)₂ + 2·NH₃(g) + 2·H₂O(l)
6. NH₃(g) + HCl(g) → NH₄Cl(s)

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Lösung:

1. CO₂(s) Sublimated to CO₂(g):

       ΔSoR Gt0, ΔHoR Gt0

       ΔSoR Gt0, There you go. CO₂ of Notwithstanding: (s) to Gaseous (g) Transmitted will be

       ΔHoR Gt0, There you go. CO₂ first. Liquefied and and then in The Gaseous State of operation Transmitted will be, Endothermer The process

2. Heating of CaCO₃(s):

       ΔSoR Gt0, ΔHoR Gt0

       ΔSoR In the case of One of them Temperature increase Moving The Commission The Particles more severe (I 'm going . and I 'm here), dS Therefore, Gt0

       ΔHoR Gt0, There you go. Heating, Speak It 's must Energy invested will be, Endothermer The process

3. CO₂(g) + CaO(s) → CaCO₃(s):

       ΔSoR It 's …0, ΔHoR It 's …0

       ΔSoR It 's …0, There you go. from two Particles a Particles will be. In addition, to the Part of Transition from Gas phase in fixed Stage.

       experiment (or could Calculated will be), Exotherms The process, ΔHoR It 's …0

4. H₂O(s) → H₂O(l) → H₂O(g) → 0.5·O₂(g) + H₂(g):

       ΔSoR Gt0, ΔHoR Gt0

       ΔSoR Gt0, There you go. Transitions of Notwithstanding: → Fresh or chilled → Gaseous, In addition, to be created more Particles

       ΔHoR Gt0, Everyday experience: Transmitting of Notwithstanding: → Fresh or chilled and so on. needs Energy, Endothermer The process

5. NH₃(g) + HCl(g) → NH₄Cl(s):

       ΔSoR It 's …0, ΔHoR It 's …0

       ΔSoR It 's …0, from two (Gas)-Particles will be a Particles

       ΔHoR It 's …0, The reasoning However, It 's just … with One of them calculation possible

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