Question

1 When does matter actually undergo a change of state?​

Answer 1

Answer:

Changes of state are physical changes. They occur when matter absorbs or loses energy. Processes in which matter changes between liquid and solid states are freezing and melting. Processes in which matter changes between liquid and gaseous states are vaporization, evaporation, and condensation.

Answer 2

${\tt{\green{\underline{\underline{\huge{ANSWER:—}}}}}}$

ᴡʜᴇɴ ᴄʜᴇᴍɪᴄᴀʟ ʀᴇᴀᴄᴛɪᴏɴ ᴏᴄᴄᴜʀs ᴛʜᴇɴ ᴍᴀᴛᴛᴇʀ ᴀᴄᴛᴜᴀʟʟʏ ᴜɴᴅᴇʀɢᴏɪɴɢ ᴀ ᴄʜᴀɴɢᴇ ᴏғ sᴛᴀᴛᴇ.