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Enthalpy and entropy

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Question 4

The table below shows standard entropies, S⊖S^\ominusS⊖, at 298 K.

SubstanceC(s, graphite)\text{C}(\text{s, graphite})C(s, graphite)H2(g)\text{H}_2(\text{g})H2​(g)O2(g)\text{O}_2(\text{g})O2​(g)CH3OH(l)\text{CH}_3\text{OH}(\text{l})CH3​OH(l)
S⊖ / J K−1 mol−1S^\ominus\text{ / J K}^{-1}\text{ mol}^{-1}S⊖ / J K−1 mol−16131204127

What is the standard entropy change, ΔS⊖\Delta S^\ominusΔS⊖, in J K−1 mol−1\text{J K}^{-1}\text{ mol}^{-1}J K−1 mol−1, for the standard formation of 1 mol of liquid methanol, CH3OH(l)\text{CH}_3\text{OH}(\text{l})CH3​OH(l)?

−486-486−486

−345-345−345

−243-243−243

+243+243+243

Enthalpy and entropy Questions

  1. A Level
  2. /Chemistry
  3. /Enthalpy and entropy