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MCS,PHD
Argosy University/ Phoniex University/
Nov-2005 - Oct-2011
Professor
Phoniex University
Oct-2001 - Nov-2016
The thermal decomposition of dimethyl ether (CH3) 2O (g) ? CH4 (g) + H2 (g) + CO (g) is to be carried out in an isothermal 2.00-liter laboratory reactor at 600°C. The reactor is charged with pure dimethyl ether at a pressure of 350 torr. After about two hours, the reactor pressure is 875 torr.
(a) Has the reaction proceeded to completion at the end of the two-hour period? If not, what percentage of the dimethyl ether has decomposed?
(b) Taking elemental species [C(s), H2 (g), 02 (g)] at 25°C as references, prepare and fill in an inlet— outlet enthalpy table. (See Example 9.5-2) Use tabulated data for methane, hydrogen, and carbon monoxide, and the following data for dimethyl ether: ?H°f = – 180.16 kJ/mol Cp [J/(mol ·K)] = 26.86 + 0.1659T — 4.179 x 10-5 T2 (T in Kelvin)
(c) Calculate ?H? (600°C) and ?U? (600°C) for the dimethyl ether decomposition reaction. (d) How much heat (kJ) was transferred to or from the reactor (state which it is) during the two- hour period of the reaction?
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