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Fuel cells produce electricity from hydrogen. The life of the fuel cell depends on produc- ing relatively pure hydrogen. Methane (natural gas) is often used as a feed to produce hydrogen. Consider the production of hydrogen 1 H2 2 by the dissociation of methane 1 CH4 2 into solid carbon (C). The process can be described by the following chemical reactionCH4 1 g 2 dS C 1 s 2 1 2H2 1 g 2
The temperature is 1000 K and the pressure is 1000 Pa. You may assume that D hrxn does not change with temperature.
(a) What is the equilibrium constant at 298 K?
(b) What is the equilibrium constant at 1000 K?
(c) What is the maximum amount of H2 that can be produced per mole of CH4 in the feed?
(d) Why is this reaction run at 1000 K instead of 298 K?
(e) Why is this reaction run at 1000 Pa instead of 1 bar?
Describe the phenomenons of osmosis, freezing point lowering and boiling point increase and what is the osmotic pressure of the above salt/sugar solution in comparison to pure water?
Eight open-chain isomeric alcohols have the formula C5H11OH. Draw the structural formula and write the IUPAC name for each of these alcohols.
A rock sample contains traces of 238U, 235U, 232Th, 208Pb, 207Pb, and 206Pb. Careful analysis shows that the ratio of the amount of 238U to 206Pb is 1.164.
Plot the radial functions for the 2s and 2p orbitals to explain how shielding plays into the relative energy of 2p electrons to 2s in a multi electron system. What is the relative energy in a hydrogenic (1 electron) system.
Be able to utilize hydroboration/oxidation for alkenes to generate the opposite regionselectivity from acid-catalyzed hydration, as well as recognize how the mechanism drives this selectivity, and the stereospecificity, of the reaction.
A solution of only A is made that is initially 0.800 M. After the solution is allowed to reach equilibrium, it is determined that the concentration of B is 1.20 x 10^-4 M. Use this information to determine the equilibrium constant for the reaction..
What determines whether a group on a benzene ring will be activating or deactivating and ortho para
A sample of nitrogen of mass 3.12 g at 23 C is allowed to expand reversibly and adiabatically from 400 cm^3 to 2 dm^3
The amount of nitrogen in an organic substance can be determined by an analytical method called the Kjeldahl method, in which all the nitrogen in the organic substance is converted to ammonia.
A 0.062 M aqueous sample of species y was analyzed by atomic absorption spectroscopy at 525 nm and in a 1.00-cm cell and yielded a %T value of 70.19 % . Calculate the molar absorptivity of species y.
If a solution has a pH = 7.0 and Cd2+ is added to it (the ksp of Cd(OH)2 = 2.5 x 10-14) what molar concentration of cadmium ion is needed for precipitation to occur
The mass spectrum of an organic compound shows the relative abundances of M to be 44.42% and M 1 to be 10.57%. Assuming the peaks are caused by 12C and 13C isotopes
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