2. The major source of aluminium in the world is bauxite (mostly aluminium oxide). The thermaldecomposition can be written asAl2O3(s) → 2AI(s) + 3/½02(g)What is the enthalpy change when 50.0 g of Al is produced?AH = 1676.0 kJ 9. You place 75.0 mL of 0.25 M NaOH in a coffee-cup calorimeter at 25.0°C and add 25.0 mL of 0.25 M HCI,also at 25.0°C. After stirring, you found that the heat, q of the reaction is -924.67 J. Calculate the changein enthalpy of the reaction (in kJ/mol of the H2O formed).

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2. The major source of aluminium in the world is bauxite (mostly aluminium oxide). The thermal decomposition can be written as Al2O3(s) → 2AI(s) + 3/½02(g) What is the enthalpy change when 50.0 g of Al is produced? AH = 1676.0 kJ

2. The major source of aluminium in the world is bauxite (mostly aluminium oxide). The thermal decomposition can be written as Al2O3(s) → 2AI(s) + 3/½02(g) What is the enthalpy change when 50.0 g of Al is produced? AH = 1676.0 kJ

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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（1）Consider the reaction: 2A (g) + 3 B (g) → 2 C (g) ΔHrxn = +254.3 kJ What will be the enthalpy change (in kJ) if 0.471 mol B reacts in excess A? （2）Consider the reaction: C (s) + O2 (g) → CO2 (g) ΔHrxn = -393.5 kJ What mass of carbon (in g) must be reacted via this mechanism to release 581.2 kJ of heat?
In a constant pressure coffee-cup calorimeter, 100.0 mL of 0. 050 M of Ag+ was mixed with 100.0 ml of 0.050 M of Cl‒. The temperature changed from 298.5 K to 299.4 K. Calculate the enthalpy of reaction, ΔH (kJ/mol). Assume that the solutions have a density of water (1 g/mL) and specific heat capacity of water (4.184 J/g °C). Ag+(aq) + Cl‒(aq) ⟶ AgCl(s)