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A scientist wants to perform a reaction in a vacuum chamber to control the experiment as much as possible and to prevent other variables from impacting the reaction. The scientist is trying to determine if the reaction is endothermic or exothermic and measure how much energy is absorbed or given off. Is this a sound approach? Why or why not? In three to five sentences, explain your reasoning.

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Answer:

The scientist needed to use a calorimeter where heat is neither evolved nor absorbed.

Explanation:

A vacuum chamber is defined as any system from which air and any other gas have been thoroughly excluded. If the intention of the scientist is to exclude any other variable and measure whether heat is given out or absorbed, then the procedure is wrong.

The scientist needed to use a calorimeter where heat is neither evolved nor absorbed.

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