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Which one of the following statements best describes the enthalpy change of a reaction?
- a)The energy released when chemical bonds are formed during a chemical reaction
- b)The energy consumed when chemical bonds are broken during a chemical reaction
- c)The difference between the energy released by bond formation and the energy consumed by bond cleavage during a chemical reaction
- d)The increase in disorder of the system as a reaction proceeds
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
Which one of the following statements best describes the enthalpy chan...
The enthalpy change of a reaction is the overall change in enthalpy as a reaction proceeds, taking into account the energy consumed by bond cleavage and the energy liberated by bond formation. The increase in disorder of the system is represented by its entropy, not its enthalpy.
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Which one of the following statements best describes the enthalpy chan...
Understanding Enthalpy Change
Enthalpy change (ΔH) in a chemical reaction reflects the overall energy exchange as reactants transform into products. Option 'C' accurately represents this concept.
Components of Enthalpy Change
- Bond Formation: When products form, chemical bonds are created, releasing energy. This energy release is a crucial part of the enthalpy change.
- Bond Cleavage: Conversely, breaking bonds in the reactants requires energy input, which is an essential factor in determining the overall energy change.
Overall Energy Difference
- Net Energy Calculation: The enthalpy change is essentially the net result of energy released during bond formation versus energy consumed during bond cleavage. This difference can be calculated as:
- Energy Released (during bond formation) - Energy Consumed (during bond breaking)
- Exothermic vs. Endothermic: If the energy released during bond formation surpasses the energy needed for bond breaking, the reaction is exothermic (negative ΔH). If the opposite is true, the reaction is endothermic (positive ΔH).
Conclusion
Option 'C' captures this comprehensive view of enthalpy change, emphasizing that it is the difference between the energy released and consumed during a chemical reaction. This understanding is fundamental in thermodynamics and helps predict the behavior of chemical reactions.
Enthalpy change (ΔH) in a chemical reaction reflects the overall energy exchange as reactants transform into products. Option 'C' accurately represents this concept.
Components of Enthalpy Change
- Bond Formation: When products form, chemical bonds are created, releasing energy. This energy release is a crucial part of the enthalpy change.
- Bond Cleavage: Conversely, breaking bonds in the reactants requires energy input, which is an essential factor in determining the overall energy change.
Overall Energy Difference
- Net Energy Calculation: The enthalpy change is essentially the net result of energy released during bond formation versus energy consumed during bond cleavage. This difference can be calculated as:
- Energy Released (during bond formation) - Energy Consumed (during bond breaking)
- Exothermic vs. Endothermic: If the energy released during bond formation surpasses the energy needed for bond breaking, the reaction is exothermic (negative ΔH). If the opposite is true, the reaction is endothermic (positive ΔH).
Conclusion
Option 'C' captures this comprehensive view of enthalpy change, emphasizing that it is the difference between the energy released and consumed during a chemical reaction. This understanding is fundamental in thermodynamics and helps predict the behavior of chemical reactions.
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Which one of the following statements best describes the enthalpy change of a reaction?a)The energy released when chemical bonds are formed during a chemical reactionb)The energy consumed when chemical bonds are broken during a chemical reactionc)The difference between the energy released by bond formation and the energy consumed by bond cleavage during a chemical reactiond)The increase in disorder of the system as a reaction proceedsCorrect answer is option 'C'. Can you explain this answer? for UGC NET 2025 is part of UGC NET preparation. The Question and answers have been prepared according to the UGC NET exam syllabus. Information about Which one of the following statements best describes the enthalpy change of a reaction?a)The energy released when chemical bonds are formed during a chemical reactionb)The energy consumed when chemical bonds are broken during a chemical reactionc)The difference between the energy released by bond formation and the energy consumed by bond cleavage during a chemical reactiond)The increase in disorder of the system as a reaction proceedsCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for UGC NET 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which one of the following statements best describes the enthalpy change of a reaction?a)The energy released when chemical bonds are formed during a chemical reactionb)The energy consumed when chemical bonds are broken during a chemical reactionc)The difference between the energy released by bond formation and the energy consumed by bond cleavage during a chemical reactiond)The increase in disorder of the system as a reaction proceedsCorrect answer is option 'C'. Can you explain this answer?.
Which one of the following statements best describes the enthalpy change of a reaction?a)The energy released when chemical bonds are formed during a chemical reactionb)The energy consumed when chemical bonds are broken during a chemical reactionc)The difference between the energy released by bond formation and the energy consumed by bond cleavage during a chemical reactiond)The increase in disorder of the system as a reaction proceedsCorrect answer is option 'C'. Can you explain this answer? for UGC NET 2025 is part of UGC NET preparation. The Question and answers have been prepared according to the UGC NET exam syllabus. Information about Which one of the following statements best describes the enthalpy change of a reaction?a)The energy released when chemical bonds are formed during a chemical reactionb)The energy consumed when chemical bonds are broken during a chemical reactionc)The difference between the energy released by bond formation and the energy consumed by bond cleavage during a chemical reactiond)The increase in disorder of the system as a reaction proceedsCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for UGC NET 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which one of the following statements best describes the enthalpy change of a reaction?a)The energy released when chemical bonds are formed during a chemical reactionb)The energy consumed when chemical bonds are broken during a chemical reactionc)The difference between the energy released by bond formation and the energy consumed by bond cleavage during a chemical reactiond)The increase in disorder of the system as a reaction proceedsCorrect answer is option 'C'. Can you explain this answer?.
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Which one of the following statements best describes the enthalpy change of a reaction?a)The energy released when chemical bonds are formed during a chemical reactionb)The energy consumed when chemical bonds are broken during a chemical reactionc)The difference between the energy released by bond formation and the energy consumed by bond cleavage during a chemical reactiond)The increase in disorder of the system as a reaction proceedsCorrect answer is option 'C'. Can you explain this answer?, a detailed solution for Which one of the following statements best describes the enthalpy change of a reaction?a)The energy released when chemical bonds are formed during a chemical reactionb)The energy consumed when chemical bonds are broken during a chemical reactionc)The difference between the energy released by bond formation and the energy consumed by bond cleavage during a chemical reactiond)The increase in disorder of the system as a reaction proceedsCorrect answer is option 'C'. Can you explain this answer? has been provided alongside types of Which one of the following statements best describes the enthalpy change of a reaction?a)The energy released when chemical bonds are formed during a chemical reactionb)The energy consumed when chemical bonds are broken during a chemical reactionc)The difference between the energy released by bond formation and the energy consumed by bond cleavage during a chemical reactiond)The increase in disorder of the system as a reaction proceedsCorrect answer is option 'C'. Can you explain this answer? theory, EduRev gives you an
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