Le Chatelier's Principle

[dinosaur93]

I know that when stating Le Chatelier's Principle, they can be very subjective in terms of word choice, How much should be write as a form of response in order to obtain the full mark?

for instance,

2NOBr_(g) -----> 2NO_(g) + Br_2(g)

What would happen to the position of the equilibrium if the pressure was increased (decreased volume).

Due to increase of pressure, the equilibrium is no longer in equilibrium. According to Le Chatelier's Principle, the system will partially oppose the change (increase pressure) by favouring the side with the least amount of particles until the new equilibrium is established....


Is this enough for an answer?

What are some of the elements that are crucial to be seen in our response to get the marks in general? thank you!

[datfatcat]

I know that when stating Le Chatelier's Principle, they can be very subjective in terms of word choice, How much should be write as a form of response in order to obtain the full mark?

for instance,

2NOBr_(g) -----> 2NO_(g) + Br_2(g)

What would happen to the position of the equilibrium if the pressure was increased (decreased volume).

Due to increase of pressure, the equilibrium is no longer in equilibrium. According to Le Chatelier's Principle, the system will partially oppose the change (increase pressure) by favouring the side with the least amount of particles until the new equilibrium is established....


Is this enough for an answer?

What are some of the elements that are crucial to be seen in our response to get the marks in general? thank you!

Say which side the reaction is heading. In this case, reverse reaction because there are fewer particles on the left hand side.

[daniel034]

the equilibrium is no longer in equilibrium.

I would also change this sentence

[datfatcat]

the equilibrium is no longer in equilibrium.

I would also change this sentence

HAHA i just spotted that

[dinosaur93]

lol, *facepalm*

tnx guys~!

[acinod]

Due to increase of pressure, the equilibrium is no longer in equilibrium. According to Le Chatelier's Principle, the system will partially oppose the change (increase pressure) by favouring the side with the least amount of particles until the new equilibrium is established....

There are 3 key points you need to include:
-State the change in the system.
-State Le Chatelier's Principle and how it applies.
-State whether there is a net back/forward reaction.

So you just remember to include the last key point. My response would be something like the following:

Le Chatelier's Principle states that if there is a change to a system in equilibrium, the system will shift in order to partially oppose this change. Hence, as a result of an increase in pressure, the system will shift towards the side with less particles in attempt to partially decrease the pressure. This will result in a net forward reaction.

Hope that helps

[michak]

In these type of questions is it necessary to say "according to LCP" each time?