CHM116 week 3 disc probs

CHM116 week 3 disc probs - CHM116 Week 3 discussion...

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1. This exothermic reaction is the basis for the Haber-Bosch process for the manufacture of ammonia: N 2 (g) + 3H 2 (g) 2NH 3 (g) To maximize the yield of ammonia, the pressure should be hi / lo and the temperature raised / lowered. Explain your answers with sentences. 2. The reaction CaCO 3 (s) CaO(s) + CO 2 (g) is the basis of a very ancient chemical industry. Seashells or chalk (limestone) are roasted in kilns to produce CaO (quicklime). When moistened and used in a mortar, this forms Ca(OH) 2 (slaked lime). Atmospheric CO 2 slowly converts this back to CaCO 3 . A strong bond thus results between the stones used in the wall. a. Is the above reaction exothermic or endothermic? Explain. b. Lime kilns, since ancient times, have been designed with efficient chimneys to draw exhaust gases away. In terms of Le Chatelier's Principle, give a reason why this enhances the conversion of limestone to quicklime. c. When a sample of CaCO
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This note was uploaded on 05/15/2011 for the course CHM 116 taught by Professor Matchett during the Fall '11 term at Grand Valley State.

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CHM116 week 3 disc probs - CHM116 Week 3 discussion...

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