What happens when the temperature or pressure of a reaction system at equilibrium is altered? the equilibrium state is unable to reestablish. the position of equilibrium is maintained. the system will try and offset the change. the system will soon reach a state of chaos.

The system will try and offset the change.

Explanation: Any change in the equilibrium is studied on the basis of Le-Chatelier's principle.

This principle states that if there is any change in the variables of the reaction, the equilibrium will shift in a direction to minimize the effect.

Thus if temperature is increased, the reaction will shift in a direction where temperature is decreasing and vice versa. Similarly if pressure is increased, the reaction will shift in a direction where pressure is decreasing and vice versa.