The Effect of Concentration and Temperature on Equilibrium Shifts
When a stress is applied to a system at equilibrium, the system will shift in the direction that relieves the stress. Stresses can include changes in concentration, volume
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About The Effect of Concentration and Temperature on Equilibrium Shifts
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Slide1Concentration and Temperature
Slide2If a stress is applied to a system at equilibrium, the system shifts in the direction that relieves the stress. Stresses include: ◦ Change in concentration ◦ Change in volume/pressure ◦ Change in temperature
Slide3PCl 5 (g) ⇆ PCl 3 (g) + Cl 2 (g) ΔH=-47kJ
Slide4Volume and pressure are related. As the volume goes up the pressure goes down and vice versa. (Boyles Law; P 1 V 1 =P 2 V 2 ) Only gases are affected by a change in volume/pressure You need to count the number of moles on each side of the reaction
Slide52H 2 O (g) ⇆ 2 H 2 (g) + O 2 (g) The left side has 2 molecules of gas, while the right side has 3 molecules of gas If the stress is pressure increasing, shift toward the side with the least number of moles of gas. If the stress is pressure decreasing, shift toward the side with the most number of moles of gas.
Slide6Le Chatelier and Pressure - YouTube
Slide7PCl5(g) ⇆ PCl 3(g) + Cl 2(g)