Chemistry

Question

Which event is an example of an exothermic reaction? (1 point)
o evaporation
o melting ice
O combustion
o decomposition

2 Answer

  • Answer:

    An exothermic reaction is defined as a reaction that releases heat and has a net negative standard enthalpy change. Examples include any combustion process, rusting of iron, and freezing of water.

    Explanation:

    An exothermic reaction is defined as a reaction that releases heat and has a net negative standard enthalpy change. Examples include any combustion process, rusting of iron, and freezing of water.

  • The combustion is an example of an exothermic reaction.

    An exothermic reaction is a reaction that releases energy, this energy is usually in the form of heat. An endothermic reaction is a reaction that absorbs energy to take place.

    Analyzing the given reactions we have that:

    • Evaporation: need to absorb energy to increase the kinetic energy of the molecules
    • Melting ice: need to absorb energy to increase the kinetic energy of the molecules
    • Combustion: releases energy after forming bonds between molecules
    • Decomposition: need to absorb energy to break molecule

    So, the combustion is an example of an exothermic reaction.

    Learn more about exothermic reaction in: brainly.com/question/14969584

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