In a vessel, the reaction is occurring. Initially the vessel contains , , and . A…

CHEMISTRY · Single correct · A Level · Chemistry · Chemical equilibria (Le Chatelier’s principle and Kc) · Chemical equilibria (Le Chatelier’s principle and Kc)

Problem

In a 5.0 L5.0\,\text{L} vessel, the reaction 2SO2(g)+O2(g)  ⇌  2SO3(g)\mathrm{2SO_2(g)+O_2(g)\;\rightleftharpoons\;2SO_3(g)} is occurring. Initially the vessel contains 0.60 mol0.60\,\text{mol} SO2\mathrm{SO_2}, 0.40 mol0.40\,\text{mol} O2\mathrm{O_2}, and 0.20 mol0.20\,\text{mol} SO3\mathrm{SO_3}. A valve is briefly opened and 0.10 mol0.10\,\text{mol} of SO3\mathrm{SO_3} is removed while the volume and temperature remain constant. What is the new value of QcQ_c immediately after the removal? (a) 1.41.4 (b) 6.9×10−26.9\times10^{-2} (c) 0.350.35 (d) 2.12.1

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