Endothermic & Exothermic Reactions Video Lessons

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Concept:

Problem: Of the following, _____ is an exothermic process.A) boilingB) sublimingC) freezingD) meltingE) all of the above are exothermic

FREE Expert Solution

Recall that:

Exothermic reactions: lose energy and involve bonds breaking; ΔH is negative

Endothermic reactions: gain energy and involve bonds forming; ΔH is positive


Recall the changes of state: 

  • Fusion or melting is the transition from a solid to liquid 
  • Freezing is the transition from a liquid to solid
  • Sublimation is the transition from a solid to gas 
  • Deposition is the transition from a gas to solid
  • Condensation is the transition from a gas to liquid 
  • Vaporization is the transition from a liquid to gas


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Problem Details

Of the following, _____ is an exothermic process.

A) boiling

B) subliming

C) freezing

D) melting

E) all of the above are exothermic

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