Questions 1-5 refer to the following aqueous reaction: 1. At equilibrium, there

Question

Questions 1-5 refer to the following aqueous reaction: 1. At equilibrium, there will be a. significantly more products than reactants b. slightly more products than reactants c. significantly more reactants than products d. slightly more reactants than products e. not enough information is given to predict ,2. Under standard conditions, this reaction would be a. spontaneous with a negative value of Go c. spontaneous with a positive value of AG° b. nonspontaneous with a negative value of AG° d. nonspontaneous with a positive value of AG 3. If more bicarbonate ion (HCO) were added to the system at equilibrium, the concentration of hydrosulfuric acid (H2S) would a. increase b. decrease c. stay unchanged d. cannot be predicted 4. If the temperature of the reaction were increased, the concentration of hydrosulfuric acid (H2S) would a. increase b. decrease c. stay unchanged d. cannot be predicted what is the value of the equilibrium constant for: 2H2CO, + 2 HS-.! 2 HC05 + 2 H,s? - -5, a. 0.31 b. 3.2 C.10.4 d. 0.096 e. something else 6. A reaction is moving towards the reactants to reach equilibrium. We thus know that e. more than one of the above

Explanation / Answer

1). as the Kp is significantly high and also the energy is given out i.e. ( change in enthalapy is negative) so the reaction is spontaneous. The reaction is favourable towards forward reaction. So at equilibrium more formation of product.

So, B) is correct option.

2) As we are given the change in enthalapy is negative. So, at constant temp it is equal to gibbs free energy (G). The overall enthalapy is negative. So the reaction is spontaneous.

A) is correct option.

3)If more bicarbonate were added at equilibrium, these will more react with the existing H2S species to form the product. So the conc. of H2S species will decrease. So B) is correct.

4) As the overall change in enthalapy for the reaction is negative. That clearly indicate that the reaction is EXOTHERMIC. So, on increasing the temp. the reaction will undergo BACKWORD direction. That means the conc. of reactant species will increases ( LHS). So A) is correct.

5) This reaction is 2 times of reverse of the reaction we were provided firstly.

So , the equilibrium constant= (1/0.31)^2 = 10.4 So C) is correct

6) E) is correct option

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