1) Compare the density of Venus to that of the Earth.
2) Convert 700K into degrees Celcius.
(a) What type of bond fission is shown in Fig 2?
(b) Write an equation for the reaction represented in Fig 2.
(c) Why will visible light not break the O-H bond?
(d) What type of particles are O and H?
(e) Classify the reaction step shown in Fig 2 as initiation, propagation or termination. Explain your answer.
(f) Write the equation for the reaction that occurs when H reacts together. Classify the type of reaction step.
(g) Why does ultraviolet dissociation of water not occur on Earth?
(h) Calculate the frequency of the radiation needed to break the O-H bond given that the bond enthalpy is 464 KJmol^-1; the Avogadro constant is 6.02 * 10^23 mol^-1 and the Plank Constant (h) is 6.63 * 10^-34 Js.
4) A hydrogen isotope can be represented as 1H. How can deuterium be represented?
5) Summarise the evidence that has led scientists to believe that the ultraviolet dissociation of water is the reason that there is no water on Venus.
6) Explain why Venus started off warmer than the Earth and has become even hotter.
7) Explain why Mars started off cooler than the Earth and why it has become even colder.
8) Why is the Earth's temperature "just right"?
9) Give an equation for a reaction that could occur when "CO2 is baked out of rocks".
1. What distinguishes Venus from the rest of the planets? Why is Venus so hot?
2. What is a runaway greenhouse?
3. If the clouds of Venus were perfect reflectors of visible light from the Sun so that no visible light reached Venus' surface, what would happen to the surface temperature? Explain your answer.
4. If the atmosphere of Venus trapped all of the infrared light from the surface, what would happen to the surface temperature? Explain your answer.
5. How does the ultraviolet-water interaction explain why Venus is so dry? How is the same process prevented on the Earth?
6. If Mars' atmosphere is over 90% carbon dioxide like Venus', why does it have such a small greenhouse effect?
7. What atmospheric phenomenon can quickly wipe out any view of Mars' surface from above? What causes this phenomenon?
8. Why does Mars have such a thin atmosphere? What is the runaway refrigerator?
9. How does liquid water remove carbon dioxide gas from an atmosphere?
10. What distinguishes Earth from the rest of the planets? What is so unusual about its atmosphere and what produces this unusual feature?
11. What are the different ways that life removes carbon dioxide from the Earth's atmosphere?
12. Where do coal, oil, and natural gas come from? What happens when they are burned?
13. What is a natural way that most of the carbon dioxide is returned to the atmosphere on Earth?
14.How does plate tectonics regulate the climate of the Earth?
15. What is a non-natural, human activity that returns a lot of carbon dioxide to the atmosphere?
16. What are the benefits of the presence of the ozone layer?
17. Is the greenhouse problem on Earth different from the ozone problem? How so?
advanced article probable questions, hope it helps
Does anyone know what the several stages could be in the ultraviolet dissociation of water on the advanced notice???
thermosetting plastics cant get reshaped because there are cross links between the particles. so heating them up would break them.
thermoplastics can get reshaped because there are no cross links between the particles so particles can slide freely on top of each other..
are any of these sentences wrong? :/
what are the stages of initiation,propagation and termanation in terms of uv dissociation of water?!
H20 >> H + OH
OH + OH >>> H2O + H
H + OH >> H2O
i thought that would be co polymerisation because they are both different