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Homework Statement
The total pressure of gases in equilibrium with solid sodium hydrogen carbonate at 110.0 degrees C is 1.648 atm, corresponding to the reaction
2NaHCO3(s) <--> Na2CO3(s) + H2O(g) + CO2(g)
a) Calculate the value of the equilibrium constant at 110.0 degrees C.
The Attempt at a Solution
I don't know how to begin this because I don't know how to find the initial partial pressure of sodium hydrogen carbonate. How am I supposed to use P total at equilibrium in this problem?