Constant question?
Answer:
In Kinetics a constant is basically a value that does not change regardless of a change of any other factor in the kinetics equation. Basically you could change the temperature of the system or change the concentration of the reactants and the constant will always stay the same. This is true for all orders; zeroth, first, second or third order kinetics.
It's simply a value which never changes. For instance, pi is a constant (3.141...) - that's all
A constant is a value or property which does not change regardless of what functions or actions are applied to it.
In chemical kinetics, there is a reaction rate constant which denotes the speed of the reaction of chemicals- i.e. means that the speed of reaction is a factor of this rate constant.
A value which does not change regardless of the other values of an equation.
These are usually found on a datasheet for exams:
- E = mc^2, the c is a constant - (speed of light in vacuum = 3 x 10^8m.s)
- W = mg, the g is a constant - ( gravitational field strength = 9.81m/s^2)
Usually in kinematics, the one you will be using most often is the gravitational constant, g = 9.81m/s^2.
E.g. calculating the speed just before impact of a ball falling towards the ground:
- You would use a = (v - u)/t
a in this case is an acceleration - since it is due to gravity this value is known - 9.81m/s^2 = g
Hence you can rewrite the equation as g = (v - u)/t and then calculate v. (u = 0, t would be given in a question)
A value which does not change regardless of the other values of an equation. it should be contain some errors that can be exist in a determination for example errors in temperature determination or in concentration or any parameters in formula or relation, so there is a constant in relations constant to cosider such errors
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