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Test: MCAT Physical
For any given chemical reaction, one can draw an energy diagram. Energy diagrams depict the energy levels of the different steps in a reaction, while also indicating the net change in energy and giving clues to relative reaction rate.
Below, a reaction diagram is shown for a reaction that a scientist is studying in a lab. A student began the reaction the evening before, but the scientist is unsure as to the type of the reaction. He cannot find the student’s notes, except for the reaction diagram below.
| 2. | Growing frustrated by his inability to decipher what chemical reaction the student had started, the scientist decides to measure the reaction vessel's temperature. Based only on the above reaction diagram, what is he most likely to find if the reaction is ongoing? (Assume that the reaction vessel is defined as the system, and that the entropy of the system decreases) |
A warm container from an exothermic reaction
The products of this reaction have an equal energy level to the reactants
A cold container from an exothermic reaction
A warm container from an endothermic reaction
A cold container from an endothermic reaction
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