I need help with 1.3 & 5.2 Chem 212 Fall 2012 Midterm Exam #2 Form EF Name 1-5)

Question

I need help with 1.3 & 5.2 Chem 212 Fall 2012 Midterm Exam #2 Form EF Name 1-5) of changes described below. (circle one answer for each -2pt each) The system below is initially at equilibrium. Predict the equillbrium response to each 2 NaHSOb(s) NaSOs (s)+ HO()+SO2 (2) 1) H:O gas is added to the reaction vessel. n no shift maller thanequal to 1.1) The equilibrium will: hift le shift 1.2) The new equilibrium partial pressure of SO, wll be: the original equilibrium partial pressure of SOs? larger than a 1.3) The immediate effect of the addition a) cause a spike decrease in the forward reaction rate b) cause a spike increase in the reverse reaction rate c) have no effect on the forward and reverse reaction rates of HO gas to the mixture is to: 2) The reaction vessel is cooled from room temperature to -15.0 c ? 2.1) The equilibrium constant would: - 22) The amounstof increase decrease remain the same esed woul (ncreas decrase remain the same 3) Some NasSO, is added to the reaction vessel SoLID 3.1) The equilibrium constant would increase decrease ain the same 3.2) The rate of the forward reaction would: Soup increase decrease remain the same ) The volume of the container is decreased, thus increasing th ure of all gases %(+tods fewtw moles 4.1) The equilibrium will: shift leftshift right no shift 5) Some of the SO gas is removed from the reaction vessel. 5.1) The system will absorb release impossible to tell heat: 5.2) The immediate effect of the removal of SO2 is to: a) cause a spike decrease in the forward reaction rate b) cause a spike decrease in the reverse reaction rate c) cause a spike increase in the forward reaction rate

Explanation / Answer

Assuming the reaction to be elimentary, since H2O(g) is added, the rate constant for backward reaction is

r= K[H2O] [SO2], since the [H2O] is increased, the rate of backward reaction increases as soon as H2O(g) is added,

2. when SO2 is removed, the rate of backward reaction decreases since rate depends on [SO2].

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