CHM135H1 Lecture 22: CHM139 Nov 3
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CHM135H1 Full Course Notes
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Le chatelier"s principle: when a system at equilibrium is subjected to change, the system responds to re-establish equilibrium. Increasing in concentraion reduce the amount of reagents or products. Increase in pressure reduce the pressure: if the number of moles are the same on both sides, there will be no change in pressure. Change in volume similar to change in pressure (volume decreased the reacion shits toward the side with the least number of moles of the gas) Change in temperature: if the reacion is endothermic and temperature is increased (t2 > t1)) k2 > k1, if the reacion is exothermic and temperature is increased (t1 > t2) k2 < k1. The system will try to undo the change that was made (adding reactant a, will try to produce more product) What statement correctly describes the graph below? (refer to slide, insert picture) B; the iniial concentraions are not the same. C is wrong because the concentraion is not decreasing.