Energy transfer in physical and chemical changes quizzes

 Revising Change of States of matter with quizzes

(Simple change of states of matter quizzes for students going in for the GCE, GCSE, and necta)

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In this section, our topic of study is physical and chemical changes. We'll be describing the energy transfers accompanying both physical and chemical changes. Quizzes on this topic are made available below, but first of all, let's have a recap of our topic:

In chemistry, phase transitions are the physical processes dealing with the transition between solid, liquid, gaseous, and plasma states of matter. The enthalpy increases as the conversions are done from solid to liquid, to gas, and finally to plasma. Below is a summary of the various phase transitions:

  Transition                   Process 

Solid to liquid                    Melting  

Liquid to solid                    Freezing

Solid to gas                         Sublimation

Gas to solid                         Deposition

Liquid to gas                       Evaporation

Gas to liquid                       Condensation

Gas to plasma                     Ionization

Plasma to gas                      Recombination

A chemical change usually occurs when a substance combines with another substance to form a new one. This process is also known as chemical synthesis. Also, it may involve the chemical decomposition into two or more substances. All these chemical processes together are called chemical reactions. A chemical reaction can be of two types: A reversible and an irreversible reaction. Furthermore, they could also be either exothermic (meaning they release heat into the environment) or endothermic (meaning they absorb heat from the environment). This section of chemistry is very important.

During the exams, students are expected to be able to describe and illustrate the energy transfer in the various physical and chemical changes. They are expected to master the concept well so as to get a good pass in questions asked on this topic. For more entertaining quizzes, click here.   

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