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Chapter 6: Q1TY (page 121)
For the reaction . Combine this reaction with the reaction to find the equilibrium constant for the reaction
The equilibrium constant (K) for the reaction of was calculated as 2.3.
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loses water when it is heated in an oven:
a) Write the equilibrium constant for this reaction. Calculate the vapour pressure of gaseous above at 298K.
(b) If and are not temperature dependent (a poor assumption), estimate the temperature at which above will be 1 bar.
From the equations
find the value of K for the reaction.
Given the following equilibria, calculate the concentration of
each zinc species in a solution saturated withand containing
at a fixed concentration of.
For at 1362Kand is positive. A vessel is charged with , andat1362K.
(a) Will the reaction proceed to the left or the right to reach equilibrium?
(b) Calculate the pressure (Pa) of each species at equilibrium.
(c) If the mixture at equilibrium is compressed to half of its original volume, will the reaction proceed to the left or the right to re-establish equilibrium?
(d) If the mixture at equilibrium is heated from 1362 to 1407K , will HBr be formed or consumed in order to re-establish equilibrium?
(a) A favorable entropy change occurs when is positive. Does the order of the system increase or decrease when is positive?
(b) A favorable enthalpy change occurs when is negative. Does the system absorb heat or give off heat when is negative?
(c) Write the relation between ,and . Use the results of parts (a) and (b) to state whether must be positive or negative for a spontaneous change.
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