10. A sample of propane gas (C3H8; 44.0972 g/mol) is placed in a 15.97 L flask at a 26.3°C and a pressure of 743.8 mmHg. What is the volume of this gas sample at 812.7 mmHg and 38.9°C? SHOW ALL WORK!!! 11. Desflurane is a gas used as an inhalation anesthesia during surgical procedures. A 24.865 g sample of desflurane (C3H2F60; 168.0392 g/mol) is placed in a 2.2855 L flask at a temperature of 374.21 K. What is the pressure exerted by this sample? SHOW ALL WORK!!! 2. A sample of carbon tetrafluoride gas (CF4; 88.0048 g/mol) is sealed in a flexible container with a volume of 87.6439 mL at a pressure of 1025.74 torr. The container is compressed such that the pressure becomes 1265.08 torr. Assuming the temperature of the sample does not change, what is the volume of the compressed gas sample? SHOW ALL WORK!!! mple of nitrogen monoxide (NO; 30.0061 g/mol) is in a constant volume flask at 17.52°C a ressure measures 536.7 mmHg. The sealed flask is placed in an oven where the pressure nes 875.6 mmHg. What is the celcius temperature of the oven? SHOW ALL WORK!

10. A sample of propane gas (C3H8; 44.0972 g/mol) is placed in a 15.97 L flask at a 26.3°C and a pressure of 743.8 mmHg. What is the volume of this gas sample at 812.7 mmHg and 38.9°C? SHOW ALL WORK!!! 11. Desflurane is a gas used as an inhalation anesthesia during surgical procedures. A 24.865 g sample of desflurane (C3H2F60; 168.0392 g/mol) is placed in a 2.2855 L flask at a temperature of 374.21 K. What is the pressure exerted by this sample? SHOW ALL WORK!!! 2. A sample of carbon tetrafluoride gas (CF4; 88.0048 g/mol) is sealed in a flexible container with a volume of 87.6439 mL at a pressure of 1025.74 torr. The container is compressed such that the pressure becomes 1265.08 torr. Assuming the temperature of the sample does not change, what is the volume of the compressed gas sample? SHOW ALL WORK!!! mple of nitrogen monoxide (NO; 30.0061 g/mol) is in a constant volume flask at 17.52°C a ressure measures 536.7 mmHg. The sealed flask is placed in an oven where the pressure nes 875.6 mmHg. What is the celcius temperature of the oven? SHOW ALL WORK!

Chemistry for Engineering Students

4th Edition

ISBN:9781337398909

Author:Lawrence S. Brown, Tom Holme

Publisher:Lawrence S. Brown, Tom Holme

Chapter5: Gases

Section: Chapter Questions

Problem 5.44PAE

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In a typical automobile engine, a gasoline vapor-air mixture is compressed and ignited in the cylinders of the engine. This results in a combustion reaction that produces mainly carbon dioxide and water vapor. For simplicity, assume that the fuel is C8H18 and has a density of 0.760 g/mL. (a) Calculate the partial pressures of N2 and 02 in the air before it goes into the cylinder; assume the atmospheric pressure is 734 mmHg. (b) Consider the case where the air, without any fuel added, is compressed in the cylinder to seven times atmospheric pressure, the compression ratio of many modem automobile engines. Calculate the partial pressures of N2 and O2 at this pressure. (c) Now consider the case where 0.050 mL gasoline is added to the air in the cylinder just before compression and completely vaporized. Assume that the volume of the cylinder is 485 mL and the temperature is 150C. Calculate the partial pressure of the gasoline vapor. (d) Calculate the amount (mol) of oxygen required to bum the gasoline in part (c) completely to CO2 and H2O. (e) The combustion reaction in the cylinder creates temperatures in excess of 1200K. Due to the high temperature, some of the nitrogen and oxygen in the air reacts to form nitrogen monoxide. If 10% of the nitrogen is converted to NO, calculate the mass (g) of NO produced by this combustion. (f) Hot-rod cars use another oxide of nitrogen, dinitrogen monoxide, to create an extra burst in power. When such a power boost is needed, dinitrogen monoxide gas is injected into the cylinders where it reacts with oxygen to form NO. Calculate the mass of dinitrogen monoxide that would have to be injected to form the same quantity of NO as produced in part (e). Assume that sufficient oxygen is present to do so.
Most mixtures of hydrogen gas with oxygen gas are explosive. However, a mixture that contains less than 3.0 % O2 is not. If enough O2 is added to a cylinder of H2 at 33.2 atm to bring the total pressure to 3-13 atm, is the mixture explosive?
What is the temperature of an 11.2-L sample of carbon monoxide, CO, at 744 torr if it occupies 13.3 L at 55 C and 74-4 torr?
The hydrocarbon octane (C8H18) bums to give CO2 and water vapor: 2 C8H18(g) + 25 O2(g) 16 CO2(g) + 18 H2O(g) If a 0.048-g sample of octane burns completely in O2, what will be the pressure of water vapor in a 4.75-L flask at 30.0 C? If the O2 gas needed for complete combustion was contained in a 4.75-L flask at 22 C, what would its pressure be?
Consider a 5.00-L tank containing 375 g of Ar at a temperature of 25 C. (a) Calculate the pressure in the tank using both the ideal gas law and the van der Waals equation. (b) Which correction term, a(n/V)2 or bn, has the greatest influence on the pressure of this system?
A 275-mL sample of CO gas is collected over water at 31C and 755 mmHg. If the temperature of the gas collection apparatus rises to 39C, what is the new volume of the sample? Assume that the barometric pressure does not change.
Many nitrate salts can be decomposed by heating. For example, blue, anhydrous copper(II) nitrate produces the gases nitrogen dioxide and oxygen when heated. In the laboratory, you find that a sample of this salt produced a 0.195-g mixture of gaseous NO2 and O2 with a total pressure of 725 mm Hg at 35 C in a 125-mL flask (and black, solid CuO was left as a residue). What is the average molar mass of the gas mixture? What are the mole fractions of NO2 and O2 in the mixture? What amount of each gas b in the mixture? Do these amounts reflect the relative amounts of NO2 and O2 expected based on the balanced equation? Is it possible that the fact that some NO2 molecules combine to give N2O4 plays a role? Heating copper(II) nitrate produces nitrogen dioxide and oxygen gas and leaves a residue of copper(ll) oxide.