Physical Chemistry

1. Draw a graph to represent the concentration of reactant and product gas molecules over time for the equilibrium system below. In the graph, show the points in time when equilibrium is initially established; when more A is introduced to the system; and when the new position of equilibrium is established. Be sure to label your graph. (2 marks) A(g) + B(g) 2AB (g)

6. This question is about intermolecular forces. a. What are the three main types of intermolecular force? Indicate in your answer which is the strongest. Group 5 elements react with hydrogen to give the following molecules: NH3, PH3, ASH3

7. You have two pure metal samples. Sample A is body-centered cubic (BCC) and sample B is face-centered cubic (FCC). You are told the edge length of the unit cell, a, for each sample, and the experimental density. The data is summarized in the table below.

8. For each question below, determine possible values of x and y. Show your working. a. KxNy b. MgxAlyO4 C. CHxFy d. AxBy in the 3D unit cell:

1. Using the following reactions, calculate the heat of formation, 4Hf, of H₂S using Hess' Law. SHOW ALL YOUR WORK. (1) H₂(g) + 1/2O₂(g) → H₂O(l) + 285.8 kJ (2) 2H₂S(g) + 30₂(g) →2SO₂(g) + 2H₂O(l) + 1124.0 kJ (3) S(s) + O₂(g) → SO₂(g) + 296.8 kJ

2. If 0.312 g of fuel increases the temperature of a calorimeter by 18 °C, and the calorimeter is calibrated at 5.49 kJ/°C, calculate the heat of combustion of fuel per gram. SHOW ALL YOUR WORK.

Find 5 incidents, and compare them in a table. Provide a comparison of the incidents in terms of impact and mitigation Discuss changes to policies or regulations arising from the incident

Q1: Convert 0.122 mg/mm²/second to a) mg/dm²/day (mdd) b) mg/m²/day

Homework #4 - Shape and lonic Formulas Write formulas for the following ionic compounds. 1. Li and O 2. Al and Cl 3. Sodium and Nitrate 4. Cr(II) and Bromine 5. Ammonium and Sulfur 6. Silver (1) and Phosphate 7. Magnesium and Carbonate Molecular Shapes CA = central atom and TA = terminal atom. Identify which of the following drawings on the left represents each compound and write the letter in the space labeled "Correct Lewis Dot". Then identify the name of the shape the molecule will make and draw a 3D sketch of the molecule.

4. The equilibrium constant for the following hypothetical reaction below at constant temperature is Keq = 0.0075. If [A] = 0.89 mol/L, [B] = 0.35 mol/L, and [C] = 0.046 mol/L, find Qeq and determine in which direction the reaction will proceed to establish equilibrium. (2 marks) 2 A(B) 2 3B (g) + C (8)