Author Question: Kw for the auto-ionization of water, H2O(l) H+(aq) + OH (aq), is 1.0 1014. What are the signs (+/) ... (Read 30 times)

elarge · **on:** Nov 5, 2023

Question 1

In the gas phase, methyl isocyanate (CH₃NC) isomerizes to acetonitrile (CH₃CN),
H₃C–N≡C (g)

H₃C–C≡N (g)
with ΔH° = –89.5 kJ/mol and ΔG° = – 73.8 kJ/mol at 25°C. Find the equilibrium constant for this reaction at 100°C.
◦ 1.68 × 10^–10

◦ 5.96 × 10⁹

◦ 2.16 × 10¹⁰

◦ 4.63 × 10^–11

◦ 8.64 × 10¹²

Question 2

K_w for the auto-ionization of water, H₂O(l) → H⁺(aq) + OH^– (aq), is 1.0 × 10^–14. What are the signs (+/–) of ΔS° and ΔH° for the reaction at 25°C?
◦ ΔS° = (+) and ΔH° = (+)
◦ ΔS° = (+) and ΔH° = (–)
◦ ΔS° = (–) and ΔH° = (+)
◦ ΔS° = (–) and ΔH° = (–)

Talvinder.Singh · **Reply #1 on:** Nov 5, 2023

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