Respuesta :

TimMil

Answer:

a) freezing and condensation

Explanation:

During Freezing and condensation , substance release energy because these both are exothermic reactions.

What is freezing?

  • The phase shift of a material from a liquid to a solid form is referred to as freezing. For example water changes to ice.
  • This is a phase transition phenomena, which occurs when a substance changes from one state of matter to another.

What is condensation?

  • Condensation is the transformation of water vapour into liquid water.  For example fluffy clouds floating over your head.
  • When the water droplets in clouds mix, they become heavy enough to pour down on your head.

What are the  exothermic reactions?

  • A process in which energy is emitted in the form of light or heat is known as an exothermic reaction.
  • As a result, rather of absorbing energy from the surroundings as in an endothermic reaction, energy is transferred into the surroundings in an exothermic reaction.
  • The change in enthalpy (H) in an exothermic process is negative.

Hence, the correct option is A.

To know more about exothermic reaction here

https://brainly.com/question/10373907

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