In which of the following processes is AH = AU?Two moles of hydrogen iodide gas react to form hydrogen gas and iodine gas in a 40-L container.O Calcium carbonate is heated to form calcium oxide and carbon dioxide in a container with variable volume.One mole of solid carbon dioxide sublimes to the gas phase.O One gram of water is vaporized at 100°C and 1 atm.O Two moles of ammonia gas are cooled from 325°C to 300°C at 1.2 atm

A question based on thermodynamics, which is to be accomplished.

Answered: In which of the following processes is…

Chemistry & Chemical Reactivity

10th Edition

ISBN:9781337399074

Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Chapter18: Principles Of Chemical Reactivity: Entropy And Free Energy

Section: Chapter Questions

Problem 8PS

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Calculate H when a 38-g sample of glucose, C6H12O6(s), burns in excess O2(g) to form CO2(g) and H2O() in a reaction at constant pressure and 298.15 K.
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Consider the reaction H2(g)+Br2(g)2HBr(g) where H = 103.8 kJ/mol. In a particular experiment, equal moles of H2(g) at 1.00 atm and Br2(g) at 1.00 atm were mixed in a 1.00-L flask at 25C and allowed to reach equilibrium. Then the molecules of H2 at equilibrium were counted using a very sensitive technique, and 1.10 1013 molecules were found. For this reaction, calculate the values of K, G, and S.
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Why is it usually easier to use G to determine the spontaneity of a process rather than Su ?
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Explain how the entropy of the universe increases when an aluminum metal can is made from aluminum ore. Thefirst step is to extract the ore, which is primarily a formof A12O3, from the ground. After it is purified by freeingit from oxides of silicon and iron, aluminum oxide ischanged to the metal by an input of electrical energy. 2Al2O3(s)electricalenergy4Al(s)+3O2(g)
A wad of steel wool (specific heat=0.45J/gC) at 25C is misplaced in a microwave oven, which later is accidentally turned on high. The oven generates microwaves of 13.5 cm wavelength at the rate of 925 moles of those photons per second. All of the photons are converted to high-heat energy, raising the temperature of the steel wool. Steel wool reacts explosively with the oxygen in the oven when the steel wool reaches 400.0C. If the steel wool explodes after 1.55 seconds, how many grams of steel wool were accidentally put into the oven?
The value of Delta G at 261.0oC for the formation of phosphorous trichloride from its constituent elements, P2 (g) +3Cl2 (g) -> 2PCI3 (g) is ___ kJ/mol. at 25.0oC for this reaction, delta H is -720.kJ/mol, Delta G is -642.9kJ/mol and delta s is -263.7 J/K
Which of the following processes has ΔS<0? Select one: C3H8(g) + 5O2(g) → 3CO2(g) + 4H2O(g) 1.0 L of He(g) is compressed to 500 mL. Milk is added to a cup of coffee. H2O(s) → H2O(l) CaCl2(s) → Ca2+(aq) + 2Cl–(aq)

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