reaction, I2(s) + Br2(g) ⇋ 2 IBr(g) is 0.25 at 25 °C. (a) Calculate ΔrG⦵ for this reaction. (b) Bromine gas is introduced into a container with excess solid iodine. The pressure and temperature are held at 0.25 atm and 25 °C, respectively. Find the partial pressure of IBr(g) at equilibrium. Assume that the bromine is in the liquid form and that the vapour pressure of iodine is negligible. (c) In fact, solid iodine has a measurable vapour pressure at 25 °C. In this case, how would the calculation have to be modified?

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Chapter12: Chemical Equilibrium
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The equilibrium constant for the reaction, I2(s) + Br2(g) ⇋ 2 IBr(g) is 0.25 at 25 °C.

(a) Calculate ΔrG for this reaction.

(b) Bromine gas is introduced into a container with excess solid iodine. The pressure and temperature are held at 0.25 atm and 25 °C, respectively. Find the partial pressure of IBr(g) at equilibrium. Assume that the bromine is in the liquid form and that the vapour pressure of iodine is negligible.

(c) In fact, solid iodine has a measurable vapour pressure at 25 °C. In this case, how would the calculation have to be modified?

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