Question

diffusion occurs when molecules move​

Answer 1

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ᴅɪғғᴜsɪᴏɴ ᴏᴄᴄᴜʀs ᴡʜᴇɴ ᴘᴀʀᴛɪᴄʟᴇs sᴘʀᴇᴀᴅ. ᴛʜᴇʏ ᴍᴏᴠᴇ ғʀᴏᴍ ᴀ ʀᴇɢɪᴏɴ ᴡʜᴇʀᴇ ᴛʜᴇʏ ᴀʀᴇ ɪɴ ʜɪɢʜ ᴄᴏɴᴄᴇɴᴛʀᴀᴛɪᴏɴ ᴛᴏ ᴀ ʀᴇɢɪᴏɴ ᴡʜᴇʀᴇ ᴛʜᴇʏ ᴀʀᴇ ɪɴ ʟᴏᴡ ᴄᴏɴᴄᴇɴᴛʀᴀᴛɪᴏɴ. ... ᴘᴀʀᴛɪᴄʟᴇs ᴅɪғғᴜsᴇ ᴅᴏᴡɴ ᴀ ᴄᴏɴᴄᴇɴᴛʀᴀᴛɪᴏɴ ɢʀᴀᴅɪᴇɴᴛ, ғʀᴏᴍ ᴀɴ ᴀʀᴇᴀ ᴏғ ʜɪɢʜ ᴄᴏɴᴄᴇɴᴛʀᴀᴛɪᴏɴ ᴛᴏ ᴀɴ ᴀʀᴇᴀ ᴏғ ʟᴏᴡ ᴄᴏɴᴄᴇɴᴛʀᴀᴛɪᴏɴ.

Answer 2

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➡️Diffusion occurs because all molecules move due to their thermal energy.

➡️Each molecule moves in a random direction, meaning that if you wait long enough, molecules will end up being randomly distributed throughout the tube.