Question

Answer the questions.
5.
a. What are the important conditions necessary for combustion to occur?
b. How will you define a non-combustible substance?
c. Why does a paper cup containing water not catch fire when placed over a flame?
d. Why is tinder necessary for setting fire to a large piece of wood?
e. How do burning fuels contribute to global warming?
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Answer 1

Answer:

1. ᴛʜᴇ ꜰɪʀᴇ ᴛʀɪᴀɴɢʟᴇ. ᴛʜʀᴇᴇ ᴛʜɪɴɢꜱ ᴀʀᴇ ʀᴇqᴜɪʀᴇᴅ ɪɴ ᴩʀᴏᴩᴇʀ ᴄᴏᴍʙɪɴᴀᴛɪᴏɴ ʙᴇꜰᴏʀᴇ ɪɢɴɪᴛɪᴏɴ ᴀɴᴅ ᴄᴏᴍʙᴜꜱᴛɪᴏɴ ᴄᴀɴ ᴛᴀᴋᴇ ᴩʟᴀᴄᴇ---ʜᴇᴀᴛ, ᴏxyɢᴇɴ ᴀɴᴅ ꜰᴜᴇʟ. ᴛʜᴇʀᴇ ᴍᴜꜱᴛ ʙᴇ ꜰᴜᴇʟ ᴛᴏ ʙᴜʀɴ. ᴛʜᴇʀᴇ ᴍᴜꜱᴛ ʙᴇ ʜᴇᴀᴛ (ɪɢɴɪᴛɪᴏɴ ᴛᴇᴍᴩᴇʀᴀᴛᴜʀᴇ) ᴛᴏ ꜱᴛᴀʀᴛ ᴀɴᴅ ᴄᴏɴᴛɪɴᴜᴇ ᴛʜᴇ ᴄᴏᴍʙᴜꜱᴛɪᴏɴ ᴩʀᴏᴄᴇꜱꜱ
2. ᴀ ᴍᴀᴛᴇʀɪᴀʟ ᴡʜɪᴄʜ ɴᴇɪᴛʜᴇʀ ʙᴜʀɴꜱ ɴᴏʀ ɢɪᴠᴇꜱ ᴏꜰꜰ ꜰʟᴀᴍᴍᴀʙʟᴇ ᴠᴀᴩᴏᴜʀꜱ ɪɴ ꜱᴜꜰꜰɪᴄɪᴇɴᴛ qᴜᴀɴᴛɪᴛy ꜰᴏʀ ꜱᴇʟꜰ-ɪɢɴɪᴛɪᴏɴ ᴡʜᴇɴ ʜᴇᴀᴛᴇᴅ ᴛᴏ ᴀᴩᴩʀᴏxɪᴍᴀᴛᴇʟy 750°ᴄ, ᴛʜɪꜱ ʙᴇɪɴɢ ᴅᴇᴛᴇʀᴍɪɴᴇᴅ ɪɴ ᴀᴄᴄᴏʀᴅᴀɴᴄᴇ ᴡɪᴛʜ ᴛʜᴇ ꜰɪʀᴇ ᴛᴇꜱᴛ ᴩʀᴏᴄᴇᴅᴜʀᴇꜱ ᴄᴏᴅᴇ, (ꜱᴏʟᴀꜱ).
3. ᴀ ᴛʜɪɴ ᴩᴀᴩᴇʀ ᴄᴜᴩ ᴡʜɪᴄʜ ɪꜱ ꜰɪʟʟᴇᴅ ᴡɪᴛʜ ᴡᴀᴛᴇʀ ᴡɪʟʟ ɴᴏᴛ ᴄᴀᴛᴄʜ ᴜᴩ ᴛʜᴇ ꜰɪʀᴇ ɪꜰ ɪᴛ ɪꜱ ᴩʟᴀᴄᴇᴅ ᴏᴠᴇʀ ᴀ ꜰʟᴀᴍᴇ. ᴛʜɪꜱ ɪꜱ ʙᴇᴄᴀᴜꜱᴇ ᴛʜᴇ ᴩᴀᴩᴇʀ ᴄᴜᴩ ᴅᴏᴇꜱ ɴᴏᴛ ʙᴇᴄᴏᴍᴇ ᴀᴩᴩʀᴇᴄɪᴀʙʟy ʜᴏᴛᴛᴇʀ ᴛʜᴀɴ ᴛʜᴇ ᴡᴀᴛᴇʀ ɪᴛ ᴄᴀʀʀɪᴇꜱ. ᴛʜɪꜱ ɪꜱ ʙᴇᴄᴀᴜꜱᴇ ᴏꜰ ᴛʜᴇ ᴀʙꜱᴏʀᴩᴛɪᴏɴ ᴏꜰ ʜᴇᴀᴛ ʙy ᴡᴀᴛᴇʀ ɪɴ ɪᴛ.
4. ᴛɪɴᴅᴇʀ ɪꜱ ᴀ ᴍᴀᴛᴇʀɪᴀʟ ᴛʜᴀᴛ ᴄᴏᴍʙᴜꜱᴛꜱ ꜰɪʀꜱᴛ (ᴀꜱ ᴀɴ ᴇᴍʙᴇʀ ᴏʀ ꜰʟᴀᴍᴇ) ᴀɴᴅ ɪɴ ᴅᴏɪɴɢ ꜱᴏ ʜᴇᴀᴛꜱ ᴏᴛʜᴇʀ ᴍᴀᴛᴇʀɪᴀʟ (ʜᴇᴀᴠɪᴇʀ ᴛɪɴᴅᴇʀ, ᴛᴡɪɢꜱ, ᴋɪɴᴅʟɪɴɢ, ᴇᴛᴄ.) ᴛɪɴᴅᴇʀ, ᴡʜᴇɴ ꜰᴏʀᴍᴇᴅ ɪɴᴛᴏ ᴀ ᴛɪɢʜᴛ ʙᴜɴᴅʟᴇ, ᴄᴀɴ ᴀʟꜱᴏ ʙᴇ ᴜꜱᴇᴅ ᴛᴏ ᴩʀᴇꜱᴇʀᴠᴇ/ᴄᴀʀʀy ᴀɴ ᴇᴍʙᴇʀ.
5. ᴡʜᴇɴ ꜰᴏꜱꜱɪʟ ꜰᴜᴇʟꜱ ᴀʀᴇ ʙᴜʀɴᴇᴅ, ᴛʜᴇy ʀᴇʟᴇᴀꜱᴇ ʟᴀʀɢᴇ ᴀᴍᴏᴜɴᴛꜱ ᴏꜰ ᴄᴀʀʙᴏɴ ᴅɪᴏxɪᴅᴇ, ᴀ ɢʀᴇᴇɴʜᴏᴜꜱᴇ ɢᴀꜱ, ɪɴᴛᴏ ᴛʜᴇ ᴀɪʀ. ɢʀᴇᴇɴʜᴏᴜꜱᴇ ɢᴀꜱᴇꜱ ᴛʀᴀᴩ ʜᴇᴀᴛ ɪɴ ᴏᴜʀ ᴀᴛᴍᴏꜱᴩʜᴇʀᴇ, ᴄᴀᴜꜱɪɴɢ ɢʟᴏʙᴀʟ ᴡᴀʀᴍɪɴɢ.