Can I please get help with this? A mixture of krypton and oxygen gas is expanded from a volume of 93.0 L to a volume of 96.0 L, while the pressure is held constant at 17.0 atm. Calculate thework done on the gas mixture. Be sure your answer has the correct sign (positive or negative) and the correct number of significant digits.kJ☐ x10同00.18Ar

Answered: Image /qna-images/answer/91bf8d7d-8a1e-4e7d-abbe-d970762cb24b.jpg

Answered: A mixture of krypton and oxygen gas is…

World of Chemistry, 3rd edition

3rd Edition

ISBN:9781133109655

Author:Steven S. Zumdahl, Susan L. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan L. Zumdahl, Donald J. DeCoste

Chapter5: Measurements And Calculations

Section: Chapter Questions

Problem 48A

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During a recent winter month in Sheboygan, Wisconsin, it was necessary to obtain 3500 kWh of heat provided by a natural gas furnace with 89% efficiency to keep a small house warm (the efficiency of a gas furnace is the percent of the heat produced by combustion that is transferred into the house). (a) Assume that natural gas is pure methane and determine the volume of natural gas in cubic feet that was required to heat the house. The average temperature of the natural gas was 56 F; at this temperature and a pressure of 1 atm, natural gas has a density of 0.68 1 g/L. (b) How many gallons of LPG (liquefied petroleum gas) would be required to replace the natural gas used? Assume the LPG is liquid propane [ C3H8 : density, 0.5318 g/mL; enthalpy of combustion, 2219 Id/mo for the formation of CO2(g) and H2O(l) ] and the furnace used to burn the LPG has the same efficiency as the gas furnace. (c) What mass of carbon dioxide is produced by combustion of the methane used to heat the house? (d) What mass of water is produced by combustion of the methane used to heat the house? (e) What volume of air is required to provide the oxygen for the combustion of the methane used to heat the house? Air contains 23% oxygen by mass. The average density of air during the month was 1.22 g/L. (f) How many kilowatt—hours ( 1kWh=3.6106 J) of electricity would be required to provide the heat necessary to heat the house? Note electricity is 100% efficient in producing heat inside a house. (g) Although electricity is 100% efficient in producing heat inside a house, production and distribution of electricity is not 100% efficient. The efficiency of production and distribution of electricity produced in a coal-fired power plant is about 40%. A certain type of coal provides 2.26 kWh per pound upon combustion. What mass of this coal in kilograms will be required to produce the electrical energy necessary to heat the house if the efficiency of generation and distribution is 40%?
Ethylene glycol is the main component in automobile anti-freeze. To monitor the temperature of an auto cooling system, you intend to use a meter that reads from 0 to 100. You devise a new temperature scale based on the approximate melting and boiling points of a typical antifreeze solution (45C and 115C). You wish these points to correspond to 0A and 100A, respectively. a. Derive an expression for converting between A and C. b. Derive an expression for converting between F and A. c. At what temperature would your thermometer and a Celsius thermometer give the same numerical reading? d. Your thermometer reads 86A. What is the temperature in C and in F? e. What is a temperature of 45C in A?
A 48.1-ml sample of gas in a cylinder equipped with a piston is warmed from 26 °C to 88 °C. Part A What is its volume at the final temperature? (Hint: Use the combined gas law and make sure all temperatures are in kelvins.) Express your answer with the appropriate units. 口■ HẢ V = Value Units
A sample of tetrachloroethylene, a liquid used in dry cleaning that is being phased out because of its potential to cause cancer, has a mass of 40.55 g and a volume of 25.0 mL at 25∘C. What is its density at this temperature?
After sitting on a shelf for a while, a can of soda at a room temperature (69°F) is placed inside a refrigerator and slowly cools. The temperature of the refrigerator is 37°F. Newton's Law of Cooling explains that the temperature of the can of soda will decrease proportionally to the difference between the temperature of the can of soda and the temperature of the refrigerator, as given by the formula below: T = Ta + (To – Ta)e¬kt the temperature surrounding the object To = the initial temperature of the object t = the time in minutes the temperature of the object after t minutes k = decay constant T The can of soda reaches the temperature of 54°F after 40 minutes. Using this information, find the value of k, to the nearest thousandth. Use the resulting equation to determine the Fahrenheit temperature of the can of soda, to the nearest degree, after 95 minutes. Enter only the final temperature into the input box.
A plant's boilers currently use 15 ft³/day of natural gas for combustion. The natural gas has a heating value of 950 BTU/ft³, and its cost is $1.5/MMBTU. If the plant decides to replace natural gas with hydrogen fuel, calculate the amount of hydrogen fuel required in cubic feet per day and the cost of hydrogen based on its cost of $35/MMBTU.
A marine biologist is preparing a deep-sea submersible for a dive. The sub stores breathing air under high pressure in a spherical air tank that measures 68.0 cm wide. The biologist estimates she will need 8400. L of air for the dive. Calculate the pressure to which this volume of air must be compressed in order to fit into the air tank. Write your answer in atmospheres. Be sure your answer has the correct number of significant digits. 0 atm x10 x Ś
A gas has a volume of 4.30 LL at 0 ∘C ∘C. What final temperature, in degrees Celsius, is needed to change the volume of the gas to each of the following, if nn and PP do not change? 1.22 LL Express your answer to three significant figures in degrees Celsius.
An organic chemist isolates a colorless liquid from a petroleum sample. She places the liquid in a pre-weighed flask and puts the flask in boiling water, which vaporizes the liquid and fills the flask with gas. She closes the flask and reweighs it. She obtains the following data: Volume (V) of flask = 196 ml T = 99.1°C P= 751 mmHg mass of flask + gas = 81.5 g mass of flask = 78.3 g Calculate the molar mass (in g/mol) of the liquid.
You are asked to calibrate a 25.00 mL volumetric pipet. You determine the temperature of your distilled water is exactly 30 degrees celsius. You carefully determined the mass of a clean, dry beaker and found it was 60.1703 g. You pulled the water up to the mark and transferred this to the beaker and found that the new mass was 85.2263 g. What is the actualy volume of the pipet? I tried answering the question above by doing 85.2263 - 60.1703 = 25.056 g I then used 25.056 and multipled it with .995646 (which is the density of water at 30 degrees celsius I believe) The answer I got is 24.947 I am not sure if I am just doing the problem wrong or if it is simply my signifcant figures that are off? Please help :))
A cylinder measuring 2.9 cm wide and 3.5 cm high is filled with gas and the piston pushed down with a steady force. piston cylinder gas Calculate the force on the piston if the pressure in the gas is measured to be 879. kPa. Write your answer in units of kilonewtons. Be sure your answer has the correct number of significant digits. |kN
A sheet of gold weighing 8.6g and at a temperature of 14.9C is placed flat on a sheet of iron weighing 19.6g and at a temperature of 58.9C . What is the final temperature of the combined metals? Assume that no heat is lost to the surroundings. Be sure your answer has the correct number of significant digits.

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