Chemistry- Exothermic and Endothermic reactions

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crosbycasey56
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#1
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For my chemistry coursework we are looking at exothermic and endothermic reactions but i dont get what they mean, can someone please explain them to me?
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maracatinca
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Exothermic - the reaction releases heat
Endothermic - the reaction absorbs heat
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peanutbutterjam
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Exothermic releases heat/energy into its surroundings whilst endothermic absorbs heat/energy from its surroundings
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crosbycasey56
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(Original post by maracatinca)
Exothermic - the reaction releases heat
Endothermic - the reaction absorbs heat
Thank you soo much
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crosbycasey56
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(Original post by peanutbutterjam)
Exothermic releases heat/energy into its surroundings whilst endothermic absorbs heat/energy from its surroundings
Thank you very much
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Black Rose
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(Original post by crosbycasey56)
For my chemistry coursework we are looking at exothermic and endothermic reactions but i dont get what they mean, can someone please explain them to me?
Exothermic:
- Bond Formation (new bonds made)
- Releases energy (in the form of heat) to the surroundings
- Resulting in a rise in temperature

Endothermic:
- Bond breaking (Existing bonds broken)
- Takes in energy (heat) from the surroundings
- Resulting in a fall in temperature
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crosbycasey56
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#7
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(Original post by Black Rose)
Exothermic:
- Bond Formation (new bonds made)
- Releases energy (in the form of heat) to the surroundings
- Resulting in a rise in temperature

Endothermic:
- Bond breaking (Existing bonds broken)
- Takes in energy (heat) from the surroundings
- Resulting in a fall in temperature
thank you this is extremely helpful
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Treblebee
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Basically, when bonds break, it takes energy. Conversely, when bonds form, it releases energy. So the difference between Exothermic and Endothermic reactions is that in Exos, the bond-forming releases more energy than the bond-breaking uses up, which means that overall, the reaction releases energy. The opposite is true for Endos. You can usually tell if a reaction is Exo or Endothermic by if it consists of burning, oxidising, or reacting an acid with a metal (Exothermic) vs if it involves carbonates, etc. (Endothermic). Hope this is helpful
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crosbycasey56
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#9
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(Original post by Treblebee)
Basically, when bonds break, it takes energy. Conversely, when bonds form, it releases energy. So the difference between Exothermic and Endothermic reactions is that in Exos, the bond-forming releases more energy than the bond-breaking uses up, which means that overall, the reaction releases energy. The opposite is true for Endos. You can usually tell if a reaction is Exo or Endothermic by if it consists of burning, oxidising, or reacting an acid with a metal (Exothermic) vs if it involves carbonates, etc. (Endothermic). Hope this is helpful
Thank you very much it is extremely helpful
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