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Question

2CaSO4(s)2CaO(s)+2SO2(g)+O2(g),ΔH>0

Above equilibrium is established by taking sufficient amount of CaSO4(s) in a closed container at 1600 K. Then, which of the following may be correct options?
(Assume that solid CaSO4 is present in the container in each case).


A

Moles of CaO(s) will increase will the increase in temperature.

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B

If the volume of the container is doubled at equilibrium then partial pressure of SO2(g) will change at new equilibrium.

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C

If the volume of the container is halved partial pressure of O2(g) at new equilibrium will remain same.

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D

If two mole of the He gas is added at constant pressure then the moles of CaO(s) will increases.

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Solution

The correct options are
A

Moles of CaO(s) will increase will the increase in temperature.


C

If the volume of the container is halved partial pressure of O2(g) at new equilibrium will remain same.


D

If two mole of the He gas is added at constant pressure then the moles of CaO(s) will increases.


As the reaction is endothermic, it will move in the forward direction when heat is supplied. Hence, number of moles of CaO will increase.

With the increase or decrease of volume partial pressure of the gases will remain same. The individual pressures and the volume change, causing a shift in equilibrium, which then leads to reactions happening to reattain equilibrium.

Addition of an inert gas at constant pressure will reduce the partial pressure of all gases. This shifts equilibrium and causes the reaction to go in a direction to increase the number of moles.


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