Heating Effect on K

[Grace Lalanne 1D]

Why does heating the system affect the value of K? I know the magnitude is also dependent on if the reaction is exothermic or endothermic. Can someone explain why this is? thanks!

[Lynette Andreasyan 33H]

Change in temperature is the only factor that can change the value of the equilibrium constant. Therefore when you increase temperature, the value of K changes. If the forward reaction is endothermic and the reverse reaction is exothermic, then heating favors the forward reaction; meaning more products will be produced. If the forward reaction is exothermic and the reverse reaction is endothermic, then heating favors the reverse reaction resulting in the production of more reactants.

[Timothy Liu 3C]

Equilibrium is when the forward and reverse reaction rates are equal. So, changing the temperature will change the rate of the forward and reverse reactions since adding heat can speed up molecules (or slow down molecules by removing heat). This is why change in heat will affect the equilibrium constant.

[emmavandal1K]

Hi! Changing the temperature is the only thing that causes K to change. Adding or removing heat from the system/reaction will cause the reaction to either shift to the right or left, so either reactants or products will be favored. This will change the ratio of reactants and products for the reaction, which will change K ([R]/[P]).

[James Bui 1D]

So by heating system when it's breaking bonds (this means a molecule breaking into two atoms), it will lead to a endothermic reaction and adding heat to it will lead to more products forming since heat is on reactant side when it's endothermic. Then for exothermic heat is on product side since heat is released to form bonds therefore more reactant added when heat is added for exothermic reaction.

[jessicahedayi1H]

Hi,

Changing the temperature is the only way to change the equilibrium constant K. If a reaction is endothermic, increasing the temperature increases K, while increasing temp decreases K if the reaction is exothermic. If a reaction going forward is exothermic, and you increased the temperature, the reaction would proceed in the reverse. If it's endothermic going forward and you decreased the temperature, the reaction would proceed in the reverse.

[Michelle Lim 2G]

Hi! Changing temperature changes the value of the equilibrium constant. By increasing temperature k changes. If the reaction requires heat it means that the system is endothermic. By adding heat there will be more products produced because k=[p]/[r]

[Daniel Nguyen 2L]

Hello,
Heating the system means changing the temperature, hence changing the rates of the forward and reverse reactions. Additional heat causes particles to move faster and collide with each other often. Therefore K changes, shifting towards more on the products or reactants side.