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Sodium carbonate, an important chemical used in the production of glass, is made from sodium hydrogen carbonate by the reaction
2NaHCO3( s)⇌Na2CO3( s)+CO2( g)+H2O(g)
Data for the temperature variation of K for this reaction are K=1.66×10−5 at 30∘C;3.90×10−4 at 50∘C;6.27×10−3 at 70∘C; and 2.31×10−1 at 100∘C.
(a) Plot a graph similar to Figure 13-10, and determine ΔrH∘ for the reaction.