Write the equilibrium constant expression for the following reac

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 Multiple Choice QuestionsShort Answer Type

91. A sample of HI(g) is placed in a flask at a pressure of 0·2 atm. At equilibrium, the partial pressure of HI(g) is 0·04 atm. What is Kp for the given equilibrium?

                      2 HI space left parenthesis straight g right parenthesis space space rightwards harpoon over leftwards harpoon space space space space space space straight H subscript 2 left parenthesis straight g right parenthesis space plus space straight I subscript 2 left parenthesis straight g right parenthesis
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 Multiple Choice QuestionsLong Answer Type

92. At a certain temperature and total pressure of 105Pa, iodine vapour contains 40% by volume of I atoms
                  straight I subscript 2 left parenthesis straight g right parenthesis space space space rightwards harpoon over leftwards harpoon space space space space 2 straight I left parenthesis straight g right parenthesis

Calculate straight K subscript straight p for the equlibrium.
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 Multiple Choice QuestionsShort Answer Type

93.

The value of Kc for the reaction 3 straight O subscript 2 left parenthesis straight g right parenthesis space space space rightwards harpoon over leftwards harpoon space space space space 2 straight O subscript 3 left parenthesis straight g right parenthesis is 2.0 space cross times space 10 to the power of negative 50 end exponent at 25 degree straight C.  If the equilibrium concentration of straight O subscript 2 in air at 25 degree straight C is 1.6 space cross times space 10 to the power of negative 2 end exponent comma what is the concentration of O3?v 

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 Multiple Choice QuestionsLong Answer Type

94.

Calculate the value of equilibrium constant for the reaction:
straight N subscript 2 left parenthesis straight g right parenthesis space plus space 2 straight O subscript 2 left parenthesis straight g right parenthesis space space space rightwards harpoon over leftwards harpoon space space space 2 NO subscript 2 left parenthesis straight g right parenthesis semicolon space space space increment subscript straight r straight H to the power of 0 space equals space minus ve

There is 10.0 mol of N2, 14·0 mol of O2 and 0·2 mol of NO2 present at equilibrium in a 3·0L vessel at 298K.What will be the effect of increased temperature on the equilibrium constant?

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 Multiple Choice QuestionsShort Answer Type

95. For the reaction
SO subscript 2 left parenthesis straight g right parenthesis space plus space NO subscript 2 left parenthesis straight g right parenthesis space space space rightwards harpoon over leftwards harpoon space space space SO subscript 3 left parenthesis straight g right parenthesis space plus space NO left parenthesis straight g right parenthesis the partial pressure of SO2, NO2, SO3 and NO at equilibrium are 0.5, 0.8, 0.7 and 1.2 bar respectively. Calculate Kp for the reaction. 



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 Multiple Choice QuestionsLong Answer Type

96. What are the types of chemical equilibrium?
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 Multiple Choice QuestionsShort Answer Type

97. Which of the following reactions involve homogeneous equilibria and which involve heterogeneous equilibria?

left parenthesis straight a right parenthesis space 2 straight N subscript 2 straight O left parenthesis straight g right parenthesis space space rightwards harpoon over leftwards harpoon space 2 straight N subscript 2 left parenthesis straight g right parenthesis space plus space straight O subscript 2 left parenthesis straight g right parenthesis
left parenthesis straight b right parenthesis space space 2 NH subscript 3 left parenthesis straight g right parenthesis space rightwards harpoon over leftwards harpoon space space straight N subscript 2 left parenthesis straight g right parenthesis space plus space 3 straight H subscript 2 left parenthesis straight g right parenthesis
left parenthesis straight c right parenthesis space 2 Cu left parenthesis NO subscript 3 right parenthesis subscript 2 left parenthesis straight s right parenthesis space space rightwards harpoon over leftwards harpoon space space space 2 CuO left parenthesis straight s right parenthesis space plus space 4 NO subscript 2 left parenthesis straight g right parenthesis space plus space straight O subscript 2 left parenthesis straight g right parenthesis
left parenthesis straight d right parenthesis space Fe to the power of 3 plus end exponent left parenthesis aq right parenthesis space plus space 3 OH left parenthesis aq right parenthesis space rightwards harpoon over leftwards harpoon space space space Fe left parenthesis OH right parenthesis subscript 3 left parenthesis straight s right parenthesis
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 Multiple Choice QuestionsLong Answer Type

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98.

Write the equilibrium constant expression for the following reactions:

left parenthesis straight i right parenthesis space BaCO subscript 3 left parenthesis straight s right parenthesis space space rightwards harpoon over leftwards harpoon space space space space BaO left parenthesis straight s right parenthesis space plus space CO subscript 2 left parenthesis straight g right parenthesis
left parenthesis ii right parenthesis space AgBr left parenthesis straight s right parenthesis space space rightwards harpoon over leftwards harpoon space space space Ag to the power of plus left parenthesis aq right parenthesis space plus space Br to the power of minus left parenthesis aq right parenthesis
left parenthesis iii right parenthesis space Al left parenthesis straight s right parenthesis plus space 3 straight H to the power of plus left parenthesis aq right parenthesis space space space rightwards harpoon over leftwards harpoon space space space space Al to the power of 3 plus end exponent left parenthesis aq right parenthesis space plus space 3 over 2 straight H subscript 2 left parenthesis straight g right parenthesis




By convention, 

Hence  

By convention, 

  

For gases, using partial pressures,


By convention,    







By convention, 

Hence 
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99.

State and explain Le-Chatelier’s principle.

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100. With the help of Le-Chatelier’s principle, determine the favourable conditions of concentration, temperature and pressure for the reaction
straight N subscript 2 left parenthesis straight g right parenthesis space plus space 3 straight H subscript 2 left parenthesis straight g right parenthesis space space rightwards harpoon over leftwards harpoon space space space space 2 NH subscript 3 left parenthesis straight g right parenthesis semicolon space space increment subscript straight r straight H to the power of 0 space equals space minus 93.6 space kJ







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