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- Silicon forms a series of compounds analogous to the al-kanes and having the general formula SinH2n+2. The first of these compounds is silane, SiH4, which is used in the electronics industry to produce thin ultrapure silicon films. SiH4(g) is somewhat difficult to work with because it is py-ropboric at room temperature—meaning that it bursts into flame spontaneously when exposed to air. (a) Write an equation for the combustion of SiH4(g). (The reaction is analogous to hydrocarbon combustion, and SiO2 is a solid under standard conditions. Assume the water produced will be a gas.) (b) Use the data from Appendix E to calculate ? for this reaction. (c) Calculate G and show that the reaction is spontaneous at 25°C. (d) Compare G for this reaction to the combustion of methane. (See the previous problem.) Are the reactions in these two exercises enthalpy or entropy driven? Explain.Fill in the blanks: ________CdS + ________O2 ⟶________CdO + _______SO2 and is classified as ________reaction. ________C3H8O + _________O2 ⟶________ CO2 +________ H2O and is classified as _________reaction.What are all the main reaction mechanisms in organic chemistry?
- ORGANIC CHEMISTRY - PERICYCLIC REACTIONS For the reaction bellow, two mechanisms are possible, indicate them.Answer true or false to the following statements about energy diagrams and reactions. Q.) Thermal reactions occur via collisions between molecules, and the more energy in those collisions, the greater the rate of the reactions.Burning methane with oxygen is a highly exothermic reaction. Yet a mixture of methane and oxygen can be kept indefinitely without any reaction occurring. How is this possible?
- write mechanism step by step for the reaction ?Pls help ASAP. Pls do all asked questions. Pls identify the reaction below.Which are important thermodynamic parameters associated with the completion of a single step reaction? Explain its energy profile diagram. Sketch diagrams for exo-and endothermic reactions?
- Question: What is the fundamental difference between kinetic stability and thermodynamic stability in chemical reactions, and how do they influence reaction rates?Prof. Neiman and Prof. James were first to discovered in 1973 that chlorofluorocarbons (CFCs) were depleting the Earth’sozone layer when released into the atmosphere. Once they reach the stratosphere, Clis released from the CFCs molecules by interaction with UV light. Free Cl atoms areable to react with ozone in a catalytic cycle that converts O3into the more stable O2.It is estimated that a single Cl atom is able to react with∼100000 O3molecules.Although CFCs production was banned in 1996, there are still a substantial numberof motor vehicle air conditioners (MVACs) that use CFC-12 (CF2Cl2) as refrigerant.The average CFC-12 emission rate from operating MVACs has been estimated tobe 59.5 mg per hour per vehicle (Zhang et al.Environ. Sci. Technol. Lett.2017).How much chlorine, in kg, is added to the atmosphere in a year due to 100 millionMVACs using CFC-12 as refrigerant?what are positive and negative catalysis? also give examples.
