Question

define exothermic change ​

Answer 1

ᴡʜᴇɴ ᴀ ᴄʜᴇᴍɪᴄᴀʟ ᴄʜᴀɴɢᴇ ᴛᴀᴋᴇs ᴘʟᴀᴄᴇ ᴡɪᴛʜ ᴛʜᴇ ʟɪʙᴇʀᴀᴛɪᴏɴ ᴏғ ʜᴇᴀᴛ ᴇɴᴇʀɢʏ, ᴛʜᴇ ᴄʜᴀɴɢᴇ ɪs sᴀɪᴅ ᴛᴏ ʙᴇ ᴇxᴏᴛʜᴇʀᴍɪᴄ.

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Answer 2

What is the definition of exothermic change?

An exothermic reaction is a "reaction for which the overall standard enthalpy change ΔH⚬ is negative." Exothermic reactions usually release heat and entail the replacement of weak bonds with stronger ones.