Heat

[Russell Chuang 1J]

How does heat affect the equilibrium constant?

[Sophia Zhao]

For endothermic reactions, increasing temperature increases the equilibrium constant. For exothermic reactions, increasing temperature decreases the equilibrium constant.

[Erin Chin 1L]

Temperature affects the value of K (equilibrium constant) and it depends on if the reaction is endothermic or exothermic. If the reaction is endothermic, then increasing the temperature will increase K because the heat will favor product formation and shift the reaction towards the right. If the reaction is exothermic, then increasing the temperature will decrease K, as the heat will favor reactant formation and shift the reaction to the left.

[Alex FreeWolf 2E]

Hi,

Whether the K value increases or decrease due to temperature depends on whether the reaction is exothermic or endothermic.

Endothermic: temperature increases K
Exothermic: temperature decreases K

Hope this helps clarify!

[austinchun]

Heat will effect the equilibrium constant by either favoring product formation or reactant formation, which is dependent on whether the reaction is endothermic or exothermic. If the reaction is exothermic, an increase in temperature will result in a decrease in the equilibrium constant while an endothermic reaction will result in the opposite.

[loganchun]

If the reaction gives a net release of heat (negative delta h), the reaction is exothermic meaning that it releases heat and increases temperature which will decrease the equilibrium constant. If the reaction requires heat (positive delta h), the reaction is exothermic meaning that it takes up heat and decreases temperature which will increase the equilibrium constant.

[Grace Chen 3F]

Heat affects equilibrium constant differently in exothermic vs endothermic reactions

Exothermic: heat increase. --> equilibrium shift left, K decrease
Endothermic: heat increase --> equilibrium shift right, K increase

[Abby Citro 2A]

For an endothermic reaction, an increase in heat results in a right shift of the equilibrium and an increase in K.

For an exothermic reaction, an increase in heat results in a left shift of the equilibrium and a decrease in K.

[Jiayi_Cao_3E]

Hi!

Temperature has a direct relationship with heat energy, which is used up over the course of a reaction. When dealing with an endothermic forward reaction, increasing temperature will increase the heat energy. This increases the forward reaction rate more than the reverse since the forward reaction demands more heat energy than the reverse. The opposite is true for an exothermic forward reaction.

[Nishan Reddy 3K]

Heat does not necessarily affect the equilibrium constant. However, if heat is added, it does shift the equilibrium values towards the reaction that is endothermic.

[Wilson Zheng 1L]

If heat is added to a system, it can (as mentioned above), alter the equilibrium of a system depending on which direction of the reaction is endothermic. However, it doesn't fully "change" the equilibrium constant itself!

[Preethika Praveen 2G]

Heat affects the equilibrium constant because raising the temperature of an endothermic reaction increases K, shifting the reaction to the right which will favor product formation. However, raising the temperature of an exothermic reaction decreases K by shifting to the left which results in higher reactant formation.