Question

what is physical and chemical change​

Answer 1

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ᴛʜᴇ ᴅɪғғᴇʀᴇɴᴄᴇ ʙᴇᴛᴡᴇᴇɴ ᴀ ᴘʜʏsɪᴄᴀʟ ʀᴇᴀᴄᴛɪᴏɴ ᴀɴᴅ ᴀ ᴄʜᴇᴍɪᴄᴀʟ ʀᴇᴀᴄᴛɪᴏɴ ɪs ᴄᴏᴍᴘᴏsɪᴛɪᴏɴ. ɪɴ ᴀ ᴄʜᴇᴍɪᴄᴀʟ ʀᴇᴀᴄᴛɪᴏɴ, ᴛʜᴇʀᴇ ɪs ᴀ ᴄʜᴀɴɢᴇ ɪɴ ᴛʜᴇ ᴄᴏᴍᴘᴏsɪᴛɪᴏɴ ᴏғ ᴛʜᴇ sᴜʙsᴛᴀɴᴄᴇs ɪɴ ǫᴜᴇsᴛɪᴏɴ; ɪɴ ᴀ ᴘʜʏsɪᴄᴀʟ ᴄʜᴀɴɢᴇ ᴛʜᴇʀᴇ ɪs ᴀ ᴅɪғғᴇʀᴇɴᴄᴇ ɪɴ ᴛʜᴇ ᴀᴘᴘᴇᴀʀᴀɴᴄᴇ, sᴍᴇʟʟ, ᴏʀ sɪᴍᴘʟᴇ ᴅɪsᴘʟᴀʏ ᴏғ ᴀ sᴀᴍᴘʟᴇ ᴏғ ᴍᴀᴛᴛᴇʀ ᴡɪᴛʜᴏᴜᴛ ᴀ ᴄʜᴀɴɢᴇ ɪɴ ᴄᴏᴍᴘᴏsɪᴛɪᴏɴ.

Answer 2

Answer:

Physical change

a usually reversible change in the physical properties of a substance, as size or shape: Freezing a liquid is a physical change.

Chemical change

a usually irreversible chemical reaction involving the rearrangement of the atoms of one or more substances and a change in their chemical properties or composition, resulting in the formation of at least one new substance: The formation of rust on iron is a chemical change

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