AUP CHM 151 Assignment 2(2) - CHM 151 (General Chemistry)...

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CHM 151 (General Chemistry) Assignment 2 (Due date: 06-10-2008) Name: ID: 1. (a) How many joules are required to heat 100 g of copper (c = 0.389 J/gK) from 10 "C to 100°C? The same quantity of heat as in (a) is added to 100 g of aluminum (c = 0.908 J/g K) at 10 "C. Which gets hotter, the copper or aluminum? (b) Given: 4HCl(g) + O 2 (g) → 2H 2 O(l) + 2Cl 2 (g) ΔH = - 148.4 kJ HF(l) → ½ H 2 (g) + ½ F 2 (g) ΔH = + 600.0 kJ H 2 (g) + ½O 2 (g) → H 2 O(l) ΔH = - 285.8 kJ Use the above data to calculate ΔH for the reaction: 2HCl(g) + F 2 (g) → 2HF(l) + Cl 2 (g)
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2. A 2.4 g sample of carbon is burnt in a calorimeter. Given that f for CO 2 is -394 kJmol -1 and the heat capacity of the calorimeter is 10 kJ°C -1 , calculate the temperature change of the calorimeter. 3. (a) Calculate the enthalpy of decomposition of CaC0 3 into CaO and CO 2 ? CaC0 3 (s) -+ CaO (s) + CO 2 ( g ) Given: ∆H o f CaCO 3 = -288.5 kcal CaO = -151.6 kcal CO 2 = -94.0 kcal 4. (a) What are the similarities and differences between 2s and 3s orbitals.
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This note was uploaded on 06/21/2009 for the course CHEM 130 taught by Professor Kia during the Spring '09 term at Abraham Baldwin Agricultural College.

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AUP CHM 151 Assignment 2(2) - CHM 151 (General Chemistry)...

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