homework6

homework6 - 2 O = 1.0 cal/g ˚C 3(4 pts You are lying on a...

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Homework #6 Name____________________ Chem 30A 1. (5 pts) Consider the equilibrium below to predict the effect on the equilibrium composition for the following changes. Shift to the right (R), shift to the left (L), no change (NC). N 2 (g) + 3H 2 (g) 2NH 3 (g) + 92.22 KJ a) Increase the concentration of N 2 (g). __________________ b) Decrease the concentration of 3H 2 (g ). __________________ c) Increase the temperature. __________________ d) A catalyst is added. _____________________ e) Increase the volume of the container. ________________ 2. (4 pts) Suppose you place 34.3 g of carrot cake into a bomb calorimeter. The cake is ignited and the 750.0 g of water in the bomb calorimeter rises from 22.3 ˚C to 35.5 ˚C. Calculate the calories per gram of the carrot cake. Specific heat H

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Unformatted text preview: 2 O = 1.0 cal/g ˚C 3. (4 pts) You are lying on a 250 kg patch of sand in Rio that is slowly warming up as the day continues. In the morning it was 72.1˚ F and now it is 98.2˚ F. How many Joules of thermal energy were absorbed by the patch of sand? specific heat of sand 0.19 cal/g ˚C (use your book to find the necessary conversions) 4. (4 pts) If you used the 2.0 x 10 3 Cal (Kcal) you expend in energy in 1 day to heat 7.00 x 10 4 g of water at 22 ˚C, what would be the final temperature of the water? 5. (3 pts) Draw an energy diagram for the following reaction by labeling the reactants, products, activation energy, and heat of reaction. CH 4 (g) + 2O 2 (g) → CO 2 (g) + 2H 2 O(l) + 211 kcal Energy Reaction Progress...
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This note was uploaded on 10/07/2009 for the course CHEM 30a taught by Professor Harrison during the Fall '08 term at Rice.

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homework6 - 2 O = 1.0 cal/g ˚C 3(4 pts You are lying on a...

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