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CH160_2009SPRING_EXAM1_PROFSOLN_[0]

# CH160_2009SPRING_EXAM1_PROFSOLN_[0] - Name Thursday XM1 Dr...

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Name: XM1 Dr. Bastos Thursday 2/26/09 TO & Electrochem Ch160 - CU Solve these problems, and make sure to show all your workl 1. Consider the following processes: CD CH 4 (g) + 202(g) --+ C02 (g) + 2H 2 0(g) LlH1 = -802 kJ 1 mol C2,l CH4 (g) + 2C0 2 (g) --+ 2CO (g) + 2H 2 (g) LlH2 = 247 kJ 1 mol (j) CH4(g) + H 2 0(g) --+ CO(g) + 3H 2 (g) LlH3 = 206 kJ 1 mol Use these results in order to calculate LlH rxn of CH 4 (g) + 3/20 2 (g) --+ CO(g) + 2H 2 0(g) tl7 ~'/9 ;;'i\ ) - 1 -

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2. What is the maximum non-expansion work that can be obtained from a fuel cell in which the chemical reaction is the combustion of methane (CH 4 (g» at room temperature? th )/1 0 :.(, ( .. ) J :; Cli ~ C() L[ (?) t 2&21)) 2-{~) t L II L C 1R ) ]J.C/ ~ {'hr M-/, - 'Zhf?A6;. 1'1'\ ~ (- ~ 1 4·:> f + - (cJ L (2 x- 2.3 :;. / 13) . - wi 2 x .,-) )-1-:>;z. -2- \
3. An ideal gas, in an isolated system, is allowed to expand isothermally from 2.00L at 5.00 atm in two steps: First, against a constant external pressure of 3.00 atm, Second, against a constant external pressure of 2.00 atm. Calculate q, wand LiU. (,'~e.1'\ci LAo-y ,.; .... ivl..1).ivevA/r Krt.;:. 6n f>£) " C~-= 1j-W~() in ?

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