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1. At 0oC degrees calculus, Kp= 4.1 x 10-25 for the reaction: Na2SO4 10H2O(s) ? Na2SO4 (s) + 10 H2O (g)

Calculate the equilibrium pressure of the H2O vapour at both 0oC and 25 oC. The value of ?H is 522.0kj/mol, why may be assumed constant over the temperature range of interest.

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