Honors Chemistry

Name: Koen Date: Pd. Honors Chemistry Boyle's Law Problems 1. A 3.00 L pocket of air at sea level has a pressure of 100 kPa. Suppose the air pocket rises in the atmosphere to a certain height & expands to a volume of 10.0 L. What is the pressure of air at the new volume? 100 * 3 = P_{2} * 10 300/10 30 кра 2. A weather balloon has a volume of 1750 L at 103 kPa. The balloon is released into the atmosphere. At the highest point above ground, the pressure on the balloon is 35.0 kPa. What is the new volume of the balloon at this height? 103 * 1750 = 35 (103 * 1750)/35 =5K L 3. A gas at constant temperature has a volume of 7.2 L at 158 kPa. If the volume increases to 10.6 L, what is the pressure of the gas? 158 * 7.2 = p_{2} * 10.6k (158 * 17.2)/10.6 = 107.3k_{D}*c_{i} 4. A gas has an initial volume of 250 mL at 110 kPa. If the volume increases to 2.4 L, what is the new pressure of the gas? (160 * 250)/24 = 11.46kpq 5. A gas at constant temperature has a volume of 12.3 L at 95 kPa. If the pressure decreases to 78 kPa, what is the volume of the gas? (93 * 12.3)/78 = 15l 6. A ball has a volume of 5.00 Lat a pressure of 100 kPa at the surface of the ocean. What is the volume of the ball if it is submerged 100 m below the surface? The pressure increases by 9.80 kPa for every meter of ocean depth. (Hint: First find the pressure at 100 m below the surface.) 500/(trios * 0) = 0.463L Honors Chemistry Charles' Law Problems 1. The gas in a balloon occupies 3.5 L at 300 K. At what temperature will the balloon expand to 8.5 L? (8.5 * 300)/3.5 = 728.57K 2. A 250 mL volume of gas is collected at 330 K. What new volume would this sample of gas occupy at 298 K? 0.250 x 298 330 0.2266 3. A flexible container holds 45.0 L of air at 25 deg * C What would be the volume if it were cooled to 0 deg * C (45 * 2743)/298 ^ 3 = 41.3L 4. A sample of gas at constant pressure has a volume of 5.3 L at 28 deg * C If the temperature increases to 65 deg * C what is the volume of the gas? (5.3 * 338)/(30i) = 6.1l 5. A gas at 20 deg * C has a volume of 1.35 L. If the volume decreases to 450 mL, what is the temperature of the gas? (0.43 * 293)/1.35 = 984K 98k + 2B =-mg eg . 6. A gas at constant pressure has a volume of 28.5 L at 15 deg * C If the temperature of the gas decreases to - 15 deg * C what would be the volume of the gas? (28.5 * 2.58)/288 = 25.5L Honors Chemistry Gay Lusacs' Law Problems 1. A gas at constant volume has a pressure of 100KPa at 20 deg * C If the temperature of the gas decreases to - 10 deg * C what would be the pressure of the gas? (10 * 263)/(27% * 3) = 89.7Kpa 2. A sample of gas at constant volume has a pressure of 3.5 atm at 18 deg * C If the temperature increases to 60 deg * C what is the new pressure of the gas? (3.5 * 333)/(29i) = 9atm 3. A gas at 25 deg * C has a pressure of 413KPa. If the pressure decreases to 45KPa what is the temperature of the gas? 32/3 * lc - 273 = - 270.7 deg * c 4. The gas in a container has a pressure of 3.5 atm at 300 K. If the pressure is increased to 7.0 atm, what temperature will the gas be inside the container? (7 * 300)/3.5 = 600k 5. A gas is collected at 250KPa and 330 K. What new pressure would this sample of gas have at 298 K? (250 * 2.98)/330 = 2.31 * 0.1gamma*atm 6. At 450 mm Hg a container of air exists at 25 deg * C What would be the pressure of the container if were cooled to 0 deg * C ? (450 * 273)/2.98 = 41.5mm * 4g Honors Chemistry Combined Gas Law Problems **Remember if it states STP: standard temperature is 0 deg * C or 273K and standard pressure is 101.3KPa, 1 atm, or 760mmHg...So for problems 6-8, insert the appropriate standard numbers for P2 and T2 from the information above. 1. A sample of neon gas has a volume of 296 mL & a pressure of 107.4 kPa. What will volume will the gas occupy at 68.9 kPa if the temperature remains constant? (107.4 * 796)/68.9 = 4.57 * 0.7mL 2. 7.32 L of argon gas is collected at 15.9 deg * C Find the volume at - 213 deg * C if the pressure remains constant. (7.32 * 60)/28.9 = 1.52 * 0.4 3. An 8 L sample of hydrogen gas at 25 deg * C exerts a pressure of 900 kPa. If the gas is compressed to 2 L & the temperature is raised to 225 deg * C what is the pressure? (900 * 8 * 4i*gamma)/(2.9gamma*z) = 1200tpq 4. A helium balloon with a volume of 410 mL is cooled from 27 deg * C to - 27 deg * C The pressure of the gas changes from 110 kPa to 25 kPa. What is the final volume of the balloon? (110 * 410 * 246)/(300 * 2.3) = 462.7mL 5. A 56.2 L sample of oxygen gas has an initial temperature of 15 deg * C at 46.3 kPa. If the volume decreases to 32.2 L & the pressure increases to 118 kPa, what it the final temperature of the gas? 472.4K3K = 273 = 199.3 deg * C 6. If a sample of gas has a volume of 315 mL at 21.2 deg * C and 91.2 kPa, what will its volume be at STP? (91.2 * 315 * 173)/(194.4 * 101.3) =2864 dot u L Honors Chemistry 7. If a sample of gas has a volume of 295 mL at 10.4 deg * C and 80.4 kPa, what will its volume be at STP? (80.4 * 295 * 273)/(263.6 * 101.3) = 25pi * 0.5mL 8. If a sample of gas has a volume of 455 mL at 20.7 deg * C and 4.35 atm, what will its volume be at STP? (433 * 455 * 173.15)/283.85 = 361.4ml Ideal Gas Law, Effusion, and Partial Pressure Review Remember that certain molecules are diatomic. For example, nitrogen is N2. ( R = 8.31 L kPa/mol K or 0.0821L + - a * tm / m * olK ) 1. Calculate the volume occupied by 13.9 g of hydrogen at STP. 13.9/2.016 = 6.9 * 22.9 = 154.56 * 0.4 2. Calculate the volume occupied at STP by 72.5 g of carbon monoxide. 72.5/(2.8 * 0.01) = 2.59 * 22.4 = 58.7 * 0.4 3. Find the pressure in a metal cylinder that contains 0.409 mol of neon gas at 10.3 deg * C if the volume of the cylinder is 2.84 L. 0.40800821x283.92 2.84 - 3.68atm 4. Find the pressure in a metal cylinder that contains 6.42 mol of chlorine gas at 26.9 °C, if the volume of the cylinder is 2.62 L. (6.42 * 0.0521 * 300.05)/(26z) = 61.5ahm 5. If 2.41 g of in a 3.67 L flask, find the temperature in Kelvins. (150.3 * 3.67)/(0.0753 * 8.31) = 674K Honors Chemistry 6. If 11.04 g of ozone gas (03) exerts a pressure of 77.7 kPa in a 2.44 L flask, find the temperature in °C. (77.7 * 9.94)/(0.23 * 8.31) * X; 364.2k - 273.13 = 11.63 deg * C 7. What is the definition of Effusion? What element will have the fastest rate of effusion? 8. A canister has a total pressure of 1504kPa and contains pressures of 190kPa Ar, 1.8 atm N2, 860kPa Ne, and an unknown pressure of He. What is the partial pressure of He in kilopascals? What is the pressure of He in mm Hg? -H₂ 17.07 = (170 + 182.34) + 860 = 271.66 * 7.5006z = 271.65kpq 2033.2mad + g 9. A gas canister contains a mixture of CO2 at a pressure of 1.80 atm, H2O at a pressure of 1.70 atm, and Ar at a pressure of 1.5 atm. What is the total pressure exerted on the container? 1.8 + 1.7a + 1.3 = 5ahm 10. A gas canister contains a mixture of 02 at a pressure of 850 mm Hg, CO2 at a pressure of 110 kPa, and H2O. If the total pressure of the canister is 1020 kPa, what is the pressure exerted by the water vaper (H2O) in kilopascals? 1020 - C * 113.5 + 1101 )=1020-223.5=756.5 k P2