Chapter 13 Study Guide Vocabulary Know the values of... The universal gas constant The molar volume of an ideal gas at Know the formula for.... Combined gas law Ideal Gas STP Know the formula, what is constant, & whether the variables are directly or indirectly proportional (related) in... Avogadro's law Boyle's law Charles's law What does.... Dalton's law of partial pressures say? 1. The volume of 400 mL of chlorine gas at 400 mm Hg is decreased to 200 mL at constant temperature. What is the new gas pressure? A 400 mm Hg B 300 mm Hg (&800 mm Hg D 650 mm Hg 2. A sample of carbon dioxide gas occupies a volume of 20 L at standard temperature and pressure (STP). What will be the volume of a sample of argon gas that has the same number of moles and pressure but twice the absolute temperature? A 10 L B 20 L 40L D 80 L 3. Under which of the following sets of conditions will a 0.50 mole sample of helium occupy a volume of 11.2 liters? A 298 K and 0.90 atm C 373 K and 0.50 atm B 273 K and 1.10 atm 73 K and 1.00 atm 4. The temperature at which all molecular motion stops and gas theoretically occupies zero volume is D 0 °C (§0 K A -460 °C B -273 K 5. Label th following statements about pressure true or false: ru or False: pressure is exerted equally in all directions. a. b. rum r False: atmospheric pressure decreases with increasing altitude. c. True or al: gas pressure can ONLY be measured in units of mm Hg. 1 or False: pressure is defined as force per unit area. d.TI C:Le) e. ru 'or False: for a constant pressure, the volume of gas will decrease when the temperature of the gas decreases. 6. Complete the following table: 1 mol = v L @ STP = 6 . 6.z v/5 2 mol = Liqs L @ STP = 1 jail x )0;;, LI 1/2 mol = i is a L @ STP = 3.C11 X 1()‘7) particles particles particles 7. What pressure (in atmospheres) is required to compress 1.00 L of gas at 760 mm P, V, 2_ fie, Hg pressure to a volume of 50.0 mL? 2.0 u5 8. A sample of neon gas occupies 266L at 298K. At what temperature would the volume of this sample of neon need to be to have a volume of 133L if its pressure remains,constant? jay 9. A sample of ammonia has a volume of 68.7L at STP. What volume will this gas occupy at 25 °C and 15 atm.? 50 10. A sample of nitrogen gas has a volume of 1.75L at STP. How many moles of N2 are present? 00 n-) b 11. What volume of KMnO4 gas is produced from the given reaction at STP, when 2.25g of Cl2 is used as a reactant? 2K2Mn04(aq) + Cl2(g) 4 2KMn04(s) + 2KCI(aq) 1%2 L 12. What volume does 80.0g of oxygen gas occupy at a pressure of 1.22 atm and a temperature of 27 ° C. so-qL 13. If 4.0 g of 02 (g) and 4.0 g of He(g) are placed in a 5.0-L vessel at 65 °C, what will be the partial pressure of each gas and the total pressure in the vessel? Pr = Ci -35 c-Jrn cr3 qt-ryl _r-,q64,-.1 P 14. Calcium carbonate decomposes when heated to form calcium oxide and carbon dioxide. What volume of carbon dioxide can be produced from 152g of calcium carbonate at a temperature of 22 °C and pressure of 2 atm? as -) \/,' /1.5,0.)) cm, I 6 ,52_f c 62u() )02-6 15. Magnesium metal reacts with hydrochloric acid to produce hydrogen gas and a solution of magnesium chloride. Write and balance the chemical equation for this reaction, and determine the volume of the hydrogen gas generated (at 1.00 atm, 25 °C) by reacting 10.0 g Mg with an excess of hydrochloric acid. )0 HO I rl& I 1---)2 7 f-Hi_