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Unit of Energy in Energy Problems

Explore the unit and symbol of the energy used in energy problems. Understand energy transfer in bond breaking and making reactions, differentiate between endothermic and exothermic reactions, and identify the minimum energy for reactions.

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Unit of Energy in Energy Problems

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  1. What is the name and symbol of the unit of energy used in energy problems? Question 1

  2. Is energy taken in or given out when bonds break? Question 2

  3. Are all bond energies the same? Question 3

  4. Does this energy level diagram show an exothermic or an endothermicreaction? Question 4

  5. Question 5 Is energy taken in or given out when bonds are made?

  6. Question 6 What do we call the minimumamount of energy needed for a reaction to start?

  7. Question 7 Does this energy level diagram show an exothermic or an endothermicreaction?

  8. Question 8 The reaction below is exothermic. Which involves the most energy, bond breaking or bond making?

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