A scientist is trying to determine if a reaction is endothermic or exothermic and measure how much energy is absorbed

or given off. The scientist plans to perform the reaction in a vacuum chamber to control the experiment as much as
possible and to prevent other variables from impacting the reaction. A vacuum chamber is an enclosed container with all
air removed. Is this a valid approach? Why or why not? In three to five sentences, explain your reasoning.

Performing the reaction in a vacuum chamber is not a valid approach for determining if a reaction is endothermic or exothermic. This is because the absence of air can affect the reaction itself, leading to inaccurate results. Many reactions involve interactions with air molecules, and removing them can alter the reaction pathway. Additionally, the vacuum chamber may not accurately simulate the conditions of the reaction in a natural environment. It is important to conduct experiments under realistic conditions to obtain reliable data.