HW6 - ECH 152A Fall 2009 Roland Faller Homework 6 Due...

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ECH 152A, Fall 2009, Roland Faller Homework 6, October 30, 2009 Due: November 6, Beginning of Lecture 1. (6 points) (a) Estimate Δ H f (298K) for the following liquids at 25C. Acetylene, n -Hexane, Styrene (b) Determine the standard heat of reaction for the following: N 2 (g)+3H 2 (g) 2NH 3 (g) C 2 H 4 (g)+H 2 O(l) C 2 H 5 OH(l) N 2 (g)+C 2 H 2 (g) 2HCN(g) 2. (3 points) Show that two lines representing reversible adiabatic processes in a pV diagram cannot intersect. (Show if they intersect and you complete the cycle isothermally you violate the 2 nd law). 3. (6 points, This problem was on MT 2, 2008) We run the following reaction 2NH 3 + A O 2 B H 2 O + C NO 2 with a feed stream of (all percentages are molar ratios) 60% ammonia, 36% oxygen and the rest nitrogen at 400 C. (a) Determine A , B and C . (b) We now convert 60% of the ammonia isothermally. How much heat per mole feed do we need. (Neglect any phase transitions in your calculations.) 4. (6 points, This problem was on MT 2, 2007)
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HW6 - ECH 152A Fall 2009 Roland Faller Homework 6 Due...

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