0.260 mol of HI gas is placed in a 2.00 L container at 450 degree Celsius and allowed to equilibrate by the reaction 2HI(g)= h2(g) + i2 (g), at equilibrium the concentration of i2 gas is 0.0150M, what is the value of k for this reaction at this temperature?
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Expert's answer
2018-03-08T10:59:07-0500
Concentration of I2: 0.0150 mol/L Concentration of H2: 0.0150 mol/L (the same, according to the reaction equation) Amount of I2: 0.0150 ∙ 2 = 0.0300 mol Reacted amount of HI: 0.0300 ∙ 2 = 0.060 mol Amount of HI remaining: 0.260 - 0.060 = 0.200 mol Concentration of HI at equilibrium: 0.200 / 2 = 0.100 mol/L So: K = ([H_2 ][I_2])/〖[HI]〗^2 = (0.0150 ∙ 0.0150)/〖0.100〗^2 = 0.0225
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