Question

| La Tây Page 1 of 10 8/10 CHM-120 Lab 6 Gas Phase Reactions Revt-17 Questions How does oxygen affect the burning of various materials! Would you expect the same things lo acca oxygen was present? Explain your answer 2. Something that burns is said to be flammable. Do you think stel woal is lemmable? Is it readily flammable in ale? In oxygen? What sort of differences to you observe? > Block residue on glass top of burnedo 3. What did you observe on the glass plate when you burned wood in part 1? How can you use this observation to explain why the mass of burning wood decreased!

Answer 1

1. Oxygen content is necessary for the burning of materials. The rate of burning increases with the amount of Oxygen present. In the absence of Oxygen burning is impossible.

2. Steel wool is flammable, but only at extreme temperatures nearing 700 ⁰C. Since burning only really requires Oxygen, it will burn more readily in pure oxygen than in air, which is a mixture of many gases.

3. The mass of burnt wood reduces because the availability of oxygen reduces preventing all of it from burning.