How can you change the direction of a reversible reaction?

Changing the conditions, such as heating or cooling, effectively influences the direction of a reversible reaction due to the principles of Le Chatelier's Principle. This principle states that if a dynamic equilibrium is disturbed by changing the conditions, the position of equilibrium shifts to counteract the change.

For example, in an endothermic reaction, increasing the temperature will favor the forward reaction, as the system absorbs heat. Conversely, lowering the temperature in the same scenario would result in a shift toward the exothermic reaction to release heat, thus favoring the production of reactants.

This option encompasses the idea that various conditions—temperature, pressure, and concentration—can affect how a reversible reaction proceeds, making it a broader and thus more effective strategy for changing the direction compared to solely adding reactants or adjusting pressure.