They will need to be soaked and/or cooked for a longer amount of time than is on the directions if they are older than 2 years from the best by date. However, dried beans do not loose any of their nutritional value with age, so their shelf life is classified as indefinite.
Let's talk about the law of action and reaction, this is also known as Newton's third law and this simply states that for every action there's an equal and opposite reaction. So if I apply a force onto an object there's a reaction force that's applied back on the force that's been applied to it okay.
The ordinary rate law (more precisely known as the instantaneous or differential rate law) tells us how the rate of a reaction depends on the concentrations of the reactants. But for many practical purposes, it is more important to know how the concentrations of reactants (and of products) change with time.