Rate constant (k)

[Ju-Wei Wang 1I]

Why is the rate constant called the rate constant even though the value varies since it depends on temperature and activation energy?

[Samantha Joseph 1F]

Varying reactions will have varying reaction constants, but within a reaction, k remains constant so that's why they give it the name.

[Xin He 2L]

The K of a reaction is always the same, but Q is different depending on how close the reaction is to completion.

[Connor Kelligrew 2D]

The rate constant K, is constant for a particular reaction at a particular temperature

So yes, you're right; it may change with a temperature change, but usually these rate constants are measured by scientists in a lab setting, where temperature remains controlled. K is a very idealized constant because of the many other factors that may come into play that can affect the reaction rate in real life.

[Simrina Desar Dis 1H]

K is constant for each different reaction since they each have different molecules reacting at different temperatures and thus would require a different constant value to carry out the reaction. However K is the same for each individual reaction.