“…Thus, the fourfold increase in the k app 's is coming from the increased gas−liquid interfacial area, A g - l , as water converts to hydrates. It should be noted that the D , k , and H in eq 5 slightly depend on the temperature in the crystal-growth zone; , thus, they do not change much during hydrate growth, since the increase in the temperature is never >8 K in all runs. Therefore, the k app is predominantly determined by the gas−liquid interfacial area, A g - l…”