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Explaining Le Chatelier’s principle

Posted: Thu Feb 06, 2020 4:10 pm
by Phuong Tran 1G
Use Le Chatelier's principle to predict how the equilibrium composition of a reaction mixture is affected by: adding or removing reagents; compressing or expanding a gaseous mixture; and by raising or lowering the temperature.

Can someone explain the reasons for the last part?

Re: Explaining Le Chatelier’s principle

Posted: Thu Feb 06, 2020 5:43 pm
by SnehinRajkumar1L
Say you have an exothermic reaction. If you increase the temperature, that means there is heat available to favor the endothermic reaction as that reaction requires heat. So, it will shift to the right side. If you decrease the temperature, that means that the heat lost needs to be replaced, and thus, the exothermic reaction is favored.

Re: Explaining Le Chatelier’s principle

Posted: Thu Feb 06, 2020 10:44 pm
by Subashni Rajiv 1K
Something to remember is that for endothermic reactions, heat can be thought of as a reactant and for exothermic reactions it can be thought of as a product.