Question detail
Explain why it is important to include the correct sign when interpreting a calculated energy change in a chemical reaction.
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
Question
Type
exam_style
Style
Topic
Exothermic and endothermic reactions
Question
Explain why it is important to include the correct sign when interpreting a calculated energy change in a chemical reaction.
Answer
Including the correct sign indicates whether the reaction is exothermic or endothermic. An exothermic reaction releases energy, resulting in a negative energy change, while an endothermic reaction absorbs energy, leading to a positive energy change.
Explanation
This question tests the understanding of energy changes in reactions and the significance of sign in thermodynamic calculations. It emphasizes the importance of accurately interpreting results in chemistry.
Common mistake
Sign Interpretation Error
Students often forget to include the correct sign when interpreting energy changes, leading to incorrect conclusions about whether a reaction is exothermic or endothermic.
Always check if the energy change is positive or negative. A negative value indicates an exothermic reaction (energy released), while a positive value indicates an endothermic reaction (energy absorbed).
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