PRESENTATION OUTLINE
What is an equilibrium?:
It is a state in which opposing forces or influences are balanced.
Example problem
Dynamic equilibrium:
H2(g)+I2(g)⇌2HI(g)
The forward reaction is: H2(g)+I2(g)→2HI(g)
The reverse reaction is: 2HI(g)→H2(g)+I2(g)
When the rate of the forward reaction and the rate of the reverse reaction are equal, the system is said to be in equilibrium. As the reaction gets closer to equilibrium the rate of decrease levels out until the forward reaction has a constant rate.
Example one of equilibrium:
If you are running on a treadmill you are in constant motion. However, you are not moving forward or backwards. As fast as you run forward the treadmill is moving you backwards. You are in equilibrium with the treadmill.
Example two of equilibrium:
dynamic equilibrium in blood stream In the lungs, with high concentration of O2, the equilibrium shifts to combine the Hb and O2 together to make more HbO2.
In the cells, with low concentration of O2, the equilibrium shifts to break down the HbO2 and increase the amount of free O2.
Example three of equilibrium:
In a game of tug of war when your team and the opposing team are pulling the rope, yet the rope is not moving in either direction, this state is an example of equilibrium. This normally occurs when the team members of both the teams are applying equal strength or force.
Example four of equilibrium:
Homeostasis, which is a
state of equilibrium, as in an organism or cell, maintained by self-regulating processes: The kidneys maintain homeostasis in the body by regulating the amount of salt and water excreted.
