Chem 111 - Octiber 30

Chem 111 - Octiber 30 - Tuesday 10:01 AM Solid ammonium...

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Solid ammonium chloride is in equilibrium with ammonia and hydrogen chloride gases: 1. The equilibrium constant at 275 °C is 1.04 x 10 –2 . In what direction does the reaction proceed? a) What is the partial pressure of each gas at equilibrium? b) What is the mass of solid NH 4 Cl at equilibrium? c) 0.908 g of solid NH 4 Cl is placed into a closed container with a volume of 1.000 L and heated to 275 °C. [15 pts] NH 4 Cl(s) a NH 3 (g) + HCl(g) Pasted from < file:///C:\Documents%20and%20Settings\Mike\My%20Documents\Chem%20111\Fall%202007\Exam%203%20V1% 20C111%20F2007.docx > Tuesday, October 30, 2007 10:01 AM Chem 111 Page 1
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The thermite reaction was used to weld iron rails together when railroads were first constructed. The reaction is: 1. 2 Al(s) + Fe 2 O 3 (s) b 2 Fe(s) + Al 2 O 3 (s) The heats of formation of Fe 2 O 3 (s) and Al 2 O 3 (s) are -824.2 kJ and -1675.7 kJ respectively. [20 pts] Calculate the enthalpy change for the reaction as written. a) Would you expect Δ H to be larger or smaller than the answer in
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This note was uploaded on 04/07/2008 for the course CHEM 111 taught by Professor Kenney during the Spring '08 term at Case Western.

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Chem 111 - Octiber 30 - Tuesday 10:01 AM Solid ammonium...

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