# 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

## About The Effect of Concentration and Temperature on Equilibrium Shifts

PowerPoint presentation about 'The Effect of Concentration and Temperature on Equilibrium Shifts'. This presentation describes the topic on 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. The key topics included in this slideshow are . Download this presentation absolutely free.

## Presentation Transcript

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)