1. Determining the Relative Melting Points Melting Point: The temperature at which a substance will melt. It is a “property” of the substance! Melting: A substance turning from its solid state into its liquid state. Burning: When something is ON FIRE!

2. Really HotHot

3. Sulfur S (chunks) Wax C 25 H 52 (candle bits) Tin Sn (foil) Zinc Zn (foil and pellets) Aluminum Al (foil and wire) Copper Cu (wire) Iron (Steel) Fe (nail) Relative Melting Points of…

4. Al Cu Fe S Sn C 25 H 52 Zn Relative Melting Points of… CandleBunsen Burner SubstanceObservationDid it Melt?ObservationDid it Melt? aluminum foil aluminum wire copper wire iron nail sulfur chunk tin foil wax chunk zinc foil

5. Copper Coil in CANDLE FLAME

8. Steel wool in the BUNSEN BURNER FLAME

10. Sulfur S Wax C 25 H 52 Tin Sn Zinc Zn Aluminum Al Copper Cu Iron (Steel) Fe 113 o C 53 o C 232 o C 420 o C 660 o C 1083 o C 1535 o C Relative Melting Points: 127 o F 235 o F 450 o F 788 o F 1220 o F 1981 o F 2795 o F

11. Copper Coil

14. Flame diminished Flame went out Flame popped up on top

15. Copper Coil Flame diminished Flame went out Flame popped up on top Makes it smoke more!

16. Really HotHot “Dirty Burn” “Clean Burn” Soot and Smoke CO 2 and H 2 O

18. Copper Coil Copper is a good “conductor” of heat Flame area is cooled, resulting in a dirtier burn, or even putting the flame out.

19. Hydrocarbon + Oxygen Carbon Dioxide + Water Combustion Hydrocarbon + Oxygen Carbon Dioxide + Water + Carbon Compounds C x H y + O 2 CO 2 + H 2 O

20. Nail vs Steel Wool Iron (Fe)

21. Nail vs Steel Wool Steel Wool in Pure Oxygen Iron Powder Burning in Slow Motion Sparkling Poi Iron Powder in Flame Aluminum Ant Hill

22. SubstanceFreezer (-5 o C) Room Temp (20 o C) Boiling H 2 O (100 o C) Oven (200 o C) Furnace (400 o C) A long blue crystals blue liquid blue vapor B red powder red liquid C white liquid liquid vaporized D clear solid chunk clear liquid liquid boiled away colorless vapor