Practice_EXAM_II

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Unformatted text preview: olume is 3.4 L? (a) 31 (b) 68 (c) 94 (d) 130 (e) 260 Hint: Charles’s Law: 11th ed. 183 and p. 216: 5.24; 10th ed. p.p. 183‐184 Equation (5.4); 9th ed. p.p. 178‐180. Equation (5.4). 12. What is the volume (in L) of 88.4 g of carbon dioxide gas at STP? (a) 45.1 (b) 53.7 (c) 62.1 (d) 74.6 (e) 83.2 Hint: Ideal gas law. 11th ed.: p. 184 and the Practice Exercise of Example 5.3 (p. 186); Equation (5.8). 10th ed. p.p. 185‐187 Examples 5.3 & 5.4; 9th ed. p.p. 181‐182. Equation (5.8). Example 5.4. From PV = nRT where P is pressure in atm, V is volume in liter, n is mole, R is ideal gas constant 0.082 atm.L/mol.K and T is temperature in Kelvin So V = nRT/P = {(88.4/44)x0.082x(0+273.15)}/1 = 45.1 Liters. Application: A gas evolved during the fermentation of glucose (wine making) has a volume of 0.78 L at 20.1oC and 1.00 atm. What was the volume (L) of this gas at the fermentation temperature of 36.5oC and 2.00 atm pressure? (a) 0.41 b) 0.82 ( (c) 1.43 (d) 2.67 (e) 3.54 Hint: Combined gas law. p. 184 equation (5.10). 13. What is the molar mass (g/mol) of 7.10 grams of gas whose volume is 5.40 L at 741 torr and 40 oC? (a) 35.0 (b) 70.3 (c) 86.2 (d) 94.6 (e) 102.3 Hint: 11th ed.: p. 191, equation (5.12) and Example 5.9; 10th ed. p.p. 192‐194 Examples 5.9 &...
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## This note was uploaded on 01/25/2014 for the course CHEM 1411 taught by Professor None during the Fall '11 term at HCCS.

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