✔ 最佳答案
(1) Suppose that the initial partial pressures of H2 and I2 are P, then from the equation, equimolar of H2 and I2 react to give a double mole no. of HI, so at equilibrium:
Partial pressure of H2 = 0.2P
Partial pressure of I2 = 0.2P
Partial pressure of HI = 1.6P
So Kp = (1.6P)2/(0.2P x 0.2P)
= 64 (No unit)
(2) There's no difference between the 2 effects. We can state that mesomeric effect is a form of resonance, giving different structures for stabilizing the molecule.
2009-10-01 15:10:18 補充:
Since 80% of hydrogen is converted, 20% is remained. Thus 0.2 arises.
2009-10-02 17:31:02 補充:
1. You are welcome.
2. Yes, by Dalton's law, mole ratio is equivalent to partial pressure ratio
3. In fact NOT all iodine has been converted. Like hydrogen, only 80% of it has been converted.
4. 298K is just to indicate that it is a standard condition.