What is the difference between an endothermic and exothermic reaction?

(Using a diagram of energy changes) The simplest way of thinking about it is that exothermic reactions release energy, such as heat, to the surroundings whereas endothermic reactions absorb energy from the surroundings. This is because in an exothermic reaction the bonds in the products are stronger and more stable than in the reactants, while the opposite will be true for an endothermic reaction. Another way of thinking about it is that exothermic reactions are making bonds and endothermic reactions are breaking bonds. You can remember this by thinking MEXOBENDO --> MEXO= making bonds is exothermic BENDO = breaking bonds is endothermic. An example of an exothermic reaction is combustion, and one of an endothermic reaction is melting ice.

CC
Answered by Charlotte C. Chemistry tutor

8257 Views

See similar Chemistry GCSE tutors

Related Chemistry GCSE answers

All answers ▸

Describe what happens when 2 atoms of Potassium react with one atom of Sulphur


Explain the trend in reactivity of group 1 metals.


Explain how electricity is conducted through a metal. To gain full marks your answer must include a description of the structure and bonding in a metal.


How would you carry out a flame test and what colours would Li+, Na+, K+ and Ca2+ ions form?


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences