alulerobert

If neon gas travels with an average velocity of 400 m/s at a particular temperature, determine the velocity of butane at the same temperature.

1. Give the oxidation number of the underlined atoms in the following molecules or ions: 
2. CH4
3. C2H2
4. ClF
5. IF7
6. C2H4
7. K2CrO4
8. K2Cr2O7
9. NaHCO3
10. NaIO3
11. KO2
12. Se8
13. KAuCl4
14. PtCl62-
15. H5P3O10
16. WO42-
17. OF2
18. Fe
19. S2-
20. ClO4-
21. CaC2

C. D. Chang, J. C. W. Kuo, W. H. Lang, S. M. Jacob, J. J. Wise, and A. J. Silvestri [Ind. Eng. Chem. Process Des. Dev., 17, 255–260 (1978)] studied the dehydration of methanol to dimethyl ether as part of a process for production of gasoline from methanol (2CH3OH ↔ H2O + CH3OCH3). Use enthalpy of formation and Gibbs free energy of formation data to prepare a plot of the fraction of the methanol fed to the dehydration reactor that is converted to dimethyl ether versus the effluent temperature of the gas. Consider operation with an effluent pressure of 200 psia and temperatures from 500 to 760∘F. As first approximations, you may neglect the variation of the standard heat of reaction with temperature, and you may consider the gas mixture as ideal. (a) What conclusions can you draw concerning thermodynamic constraints on this reaction if high yields are desired? What are the implications of your conclusion with respect to the kinetics of this reaction? (b) Does thermodynamics favor operation at high or low pressures? What might be the advantages of operating at 200 psia rather than at approximately 1 atm or 2000 psia?