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- Butane gas, C4H10, is sold to campers as bottled fuel. Its density at 25C and 1.00 atm is 2.38 g/L. What volume of butane gas at 25C and 1.00 atm is required to heat one gallon of water (d=1.00g/mL) from 25C to 98C ? The reaction for the combustion of butane (H f =125.6kJ/mol) is C4H10(g)+132 O2(g)4CO2(g)+5H2O(g)You can use this as your reference: https://www.youtube.com/watch?v=2J2t5FRnMtMConsider a simple mass balance model where 100 CO2 molecules are released into the atmosphere from burning fossil fuels. Half of these molecules are immediately absorbed by the terrestrial biosphere and ocean: fraction f goes to the biosphere and fraction 1-f dissolves into the ocean. Assume fossil fuel combustion consumes 1.4 molecules of O2 for every molecule of CO2 produces and photosynthesis produces 1.1 molecules of O2 for every molecule of CO2 consumed. If the observed change in oxygen is a decrease of 110 molecules, what fraction of the CO2 was absorbed by the ocean.
- Chemical reactionc most comonly do work on their surroundings by a. having gases as reagents only b. Forming neutral solutions from acids and bases c. producing a lot of heat d. forming gas phase productsLong-term space missions require reclamation of the oxygen in the carbon dioxide exhaled by the crew. In one method of reclamation, 1.00 mol of carbon dioxide produces 1.00 mol of oxygen, with 1.00 mol of methane as a by-product. The methane is stored in a tank under pressure and is available to control the attitude of the spacecraft by controlled venting. A single astronaut exhales 1.03 kg of carbon dioxide each day. If the methane generated in the recycling of three astronauts' respiration during one week of flight is stored in an originally empty 140-L tank at −45.0°C, what is the final pressure in the tank?Long-term space missions require reclamation of the oxygen in the carbon dioxide exhaled by the crew. In one method of reclamation, 1.00 mol of carbon dioxide produces 1.00 mol of oxygen, with 1.00 mol of methane as a by-product. The methane is stored in a tank under pressure and is available to control the attitude of the spacecraft by controlled venting. A single astronaut exhales 1.19 kg of carbon dioxide each day. If the methane generated in the recycling of three astronauts' respiration during one week of flight is stored in an originally empty 165-L tank at −45.0°C, what is the final pressure in the tank? (MPa)
- A student dissolves 10.3g of ammonium nitrate NH4NO3 in 300.g of water in a well-insulated open cup. He then observes the temperature of the water fall from 22.0°C to 19.3°C over the course of 3.1 minutes. Use this data, and any information you need from the ALEKS Data resource, to answer the questions below about this reaction: NH4NO3s -> NH+4aq + NO−3aq You can make any reasonable assumptions about the physical properties of the solution. Be sure answers you calculate using measured data are rounded to the correct number of significant digits. Is this reaction exothermic, endothermic, or neither? If you said the reaction was exothermic or endothermic, calculate the amount of heat that was released or absorbed by the reaction in this case. Calculate the reaction enthalpy ΔHrxn per mole of NH4NO3.32 - Properties that distinguish real gases from ideal gases:There is little interaction between gas particlesII. Gas particles have their own volumeIII. The interaction between low pressure and high temperature gas particles is almost zeroWhich or which of his judgments are correct? A) II and IIIB) I aloneC) I and IIID) I and IIE) I, II and IIIA cylinder of oxygen is cooled from 27oC to -123oC. By what factor does the average kinetic energy of this system change?
- Consider the following samples of gas: sample composition pressure temperature A 2.0mol Xe (g) 1.7atm 228.°C B 2.0mol Xe (g) 1.4atm 258.°C C 2.0mol Xe (g) 1.6atm 280.°C sample composition pressure temperature D 1.5mol He (g) 1.5atm 41.°C E 1.5mol Ar (g) 2.4atm 41.°C F 1.5mol Ne (g) 1.2atm 41.°C Draw the set of graphs below that show the distributions of the speed of the atoms in each sample.Whenever organic matter is decomposed under oxygen-free(anaerobic) conditions, methane is one of the products. Thus,enormous deposits of natural gas, which is almost entirely methane, serve as a major source of fuel for home and industry.(a) Known sources of natural gas can produce 5600 EJ of energy(1 EJ 10^18J). Current total global energy usage is 4.0X10^2 EJper year. Find the mass (in kg) of known sources of natural gas(Hrxnfor the combustion of CH₄=802 kJ/mol).(b) For how many years could these sources supply the world’stotal energy needs?(c) What volume (in ft³) of natural gas, measured at STP, isrequired to heat 1.00 qt of water from 25.0C to 100.0C (d of H₂O= 1.00 g/mL; d of CH₄ at STP =0.72 g/L)?(d) The fission of 1 mol of uranium (about 4X10^4 ft³) in a nu-clear reactor produces 2X10^13 J. What volume (in ft3) of naturalgas would produce the same amount of energy?https://cxp.cengage.com/contentservice/assets/owms01h/references/chemtables/gen_chem/eo.html ^ table image: