<prompt> Bheka isigaba esingezansi bese uphendula umbuzo ngemuva kwalokho ngolimi olufanayo nesigaba: Isigaba: I-Aspirin, i-acetyl derivative ye-salicylic acid, iyinto emhlophe, eyikristalu, enama-acidic amancane, enephuzu lokuncibilika elingu-136 C 277 F, nephuzu lokubilisa elingu-140 C 284 F. Isikhathi sayo sokuhlukaniswa kwe-asidi pKa ngu-3.5 ku-25 C 77 F. Umbuzo: Kuyini ukuhlukaniswa kwe-asidi ku-Celsius?  <response>: 25 C 