Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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- A chemical engineer is studying the following reaction: 2 NO(g)+2H,(g) – N(a)+2H,0(g) At the temperature the engineer picks, the equilibrium constant K, for this reaction is 0.17. The engineer charges ("fills") four reaction vessels with nitrogen monoxide and hydrogen, and lets the reaction begin. She then measures the composition of the mixture inside each vessel from time to time. Her first set of measurements are shown in the table below. db Predict the changes in the compositions the engineer should expect next time she measures the compositions. Ar reaction vessel compound pressure expected change in pressure NO 7.34 atm Ot increase OI decrease O (no change) H, 1.96 atm O f increase OI decrease O (no change) N 1.66 atm O t increase OI decrease O (no change) H,0 10.20 atm O f increase OI decrease O (no change) NO 9.18 atm O t increase OI decrease O (no change) H. 3.80 atm O f increase OI decrease O (no change) B N, 0.74 atm O f increase OI decrease O (no change) HO 8.36 atm O f…arrow_forwardConsider the following chemical equilibrium: A(s) + B(g) ⇄ 3 C(s) + 4 D(g) If the initial pressure of B is 4.26 bar, the total pressure at equilibrium is 7.15 bar. Use these pressures to calculate Keq.arrow_forwardWrite the equilibrium constant expression. Solid carbon and carbon dioxide gas react and form carbon monoxide: C(s) + CO₂(g) = 2CO(g)arrow_forward
- A chemical engineer is studying the following reaction: N₂(g) + 3H₂(g) → 2 NH3(g) At the temperature the engineer picks, the equilibrium constant K for this reaction is 0.018. The engineer charges ("fills") three reaction vessels with nitrogen and hydrogen, and lets the reaction begin. He then measures the composition of the mixture inside each vessel from time to time. His first set of measurements are shown in the table below. Predict the changes in the compositions the engineer should expect next time he measures the compositions. reaction vessel compound pressure expected change in pressure N₂ 11.46 atm ↑ increase ↓decrease (no change) H, 18.35 atm A ↑ increase ↓ decrease (no change) NH3 32.54 atm ↑ increase (no change) N₂ 10.77 atm ↑ increase ↓ decrease ↓decrease ↓decrease decrease B H₂ 16.30 atm (no change) (no change) (no change) ↑ increase 33.91 atm ↑ increase NH3 N₂₂ 11.20 atm ↑ increase ↓ decrease (no change) H₂ 17.58 atm с ↑ increase ↓decrease (no change) NH₂ 33.05 atm ↑…arrow_forwardAn equilibrium mixture contains 0.700 mol of each of the products (carbon dioxide and hydrogen gas) and 0.200 mol of each of the reactants (carbon monoxide and water vapor) in a 1.00 L container. CO(g) + H₂O(g) ⇒ CO₂(g) + H₂(g) How many moles of carbon dioxide would have to be added at constant temperature and volume to increase the amount of carbon monoxide to 0.300 mol once equilibrium has been reestablished? moles of CO₂ I molarrow_forwardAmmonia will decompose into nitrogen and hydrogen at high temperature. An industrial chemist studying this reaction fills a 200. mL flask with 1.1 atm of ammonia gas, and when the mixture has come to equilibrium measures the partial pressure of hydrogen gas to be 1.2 atm. Calculate the pressure equilibrium constant for the decomposition of ammonia at the final temperature of the mixture. Round your answer to 2 significant digits. K = 0 P X Śarrow_forward
- Mercury and oxygen react to form mercury(II) oxide, like this: 2 Hg(1)+O2(g)→2 HgO(5) At a certain temperature, a chemist finds that a 3.6 L reaction vessel containing a mixture of mercury, oxygen, and mercury(II) oxide at equilibrium has the following composition: compound amount Hg 9.7 g O2 21.8 g HgO 10.2 g Calculate the value of the equilibrium constant K̟ for this reaction. Round your answer to 2 significant digits. K_ = 0arrow_forwardNitrosyl bromide decomposes to NO and Br2 in an endothermic process (A,H° = 16.3 kJ/mol-rxn). 2 NOBr(g) ⇒ 2 NO(g) + Br2 (g) Predict the effect of the following changes on the position of the equilibrium; that is, state which way the equilibrium will shift (left, right, or no change) when each of the following changes is made. a. adding more NOBr(g) shift left shift right O no change b. adding more Br₂(g) shift left shift right O no change c. increasing the volume of the reaction flask shift left shift right O no change d. lowering the temperature shift left shift right O no changearrow_forwardCalcium oxide and carbon dioxide react to form calcium carbonate, like this: CaO(s)+CO,(g)→CaCO3(s) At a certain temperature, a chemist finds that a 7.9 L reaction vessel containing a mixture of calcium oxide, carbon dioxide, and calcium carbonate at equilibrium has the following composition: compound amount СаО 43.4 g CO2 19.6 g CaCO3 85.7 g Calculate the value of the equilibrium constant K, for this reaction. Round your answer to 2 significant digits. K_ = []arrow_forward
- A chemical engineer is studying the following reaction: 2 H₂S(g)+30₂(g) → 2 SO₂(g) +2H₂O(g) At the temperature the engineer picks, the equilibrium constant K for this reaction is 5.0. The engineer charges ("fills") four reaction vessels with hydrogen sulfide and oxygen, and lets the reaction begin. He then measures the composition of the mixture inside each vessel from time to time. His first set of measurements are shown in the table below. Predict the changes in the compositions the engineer should expect next time he measures the compositions. reaction vessel A B compound H₂S 0₂ SO2 H₂O H₂S 0₂ SO₂ H₂O H₂S 02 SO₂ H₂O pressure 9.08 atm 1.44 atm 10.07 atm 8.80 atm 8.96 atm 1.26 atm 10.19 atm 8.92 atm 10.40 atm 3.42 atm 8.75 atm 7.48 atm expected change in pressure ↑ increase O decrease ↑ increase ↑ increase ↑ increase ↑ increase ↑ increase ↑ increase ↑ increase ↑ increase ↑ increase O decrease ↑ increase decrease O decrease ↑ increase O decrease ↓ decrease O decrease ↓ decrease O…arrow_forwardCalculating an equilibrium constant from a partial equilibrium composition Ammonia has been studied as an alternative "clean" fuel for internal combustion engines, since its reaction with oxygen produces only nitrogen and water vapor, and in the liquid form it is easily transported. An industrial chemist studying this reaction fills a 2.0 L flask with 1.2 atm of ammonia gas and 3.7 atm of oxygen gas, and when the mixture has come to equilibrium measures the partial pressure of water vapor to be 1.3 atm. Calculate the pressure equilibrium constant for the combustion of ammonia at the final temperature of the mixture. Round your answer to 2 significant digits. K = [] P x10 X ? olo 18 Ar 8.arrow_forward
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