The word "exhalence" is not a commonly used term, but it refers to the act of exhaling or emitting vapor or fumes. The IPA phonetic transcription of this word is /ɛks-hay-ləns/, which shows that the first syllable is pronounced as "eks," similar to the word "exhaust," followed by "hay" for the second syllable and ending with "ləns" for the last syllable. The spelling of this word can be a bit confusing due to the unique combination of letters, but its pronunciation is straightforward once you understand the IPA transcription.