At a certain temperature and total pressure of 10^5 Pa, iodine vapour contains 40% by volume of I atoms I_(2(g)) hArr 2I_((g)) . Calculate K_p for the equilibrium.

At a certain temperature and total pressure of 10^5 Pa, iodine vapour

1.	At a certain temperature and total pressure of 10^5 Pa, iodine vapour contains 40% by volume of I atoms I_(2(g)) hArr 2I_((g)) . Calculate K_p for the equilibrium.
Answer» Solution :At equilibrium total pressure = `10^5` Pa Partial pressure`prop` Percentage by volume of gas, CONCENTRATION of atom of I= 40% by volume `THEREFORE p_1`=40% of (Total pressure) `=(10)^5 (40//100)=0.40xx10^5` Pa `p_(I_2)`= 60% of `10^5 =10^5 xx 0.60` `=0.60xx10^5` Pa Equilibrium reaction = `I_(2(g)) hArr 2I_((g))` `therefore K_p=(p_I)^2/(p_(I_2))=(0.40xx10^5)^2/(0.60xx10^5)= 0.2667xx10^5` `=2.667xx10^4` Pa