01 Feb Exothermic reactions
Every year, thousands of students all over the world complain about Chemistry. Students often find Chemistry to be very difficult and boring. It’s easy to hate a subject but it’s time to reconsider if you think that chemistry is a waste of time.
Chemistry explains how the world around us works. At its core, everything including us is made out of atoms and chemical compounds so it means that with the understanding of the basics of chemistry we can understand how the world around us works.
Chemistry tuition classes in Miracle Learning Centre is easy to understand and help you in the chemistry tuition application questions. If you do not understand chemistry in school, you must definitely come for chemistry tuition classes at Miracle Learning Centre. Let us learn about exothermic reactions in this chemistry tuition lesson.
Exothermic reactions give out energy to the surrounding. Hence the products have less energy than the reactants. This results in enthalpy change being negative. The activation energy of an exothermic reaction is from the reactants to the top of the curve of the energy profile diagram. The activation energy is the minimum energy required for the reaction to take place. Hence energy is required to break the bonds in the reactants. An exothermic reaction alone involves bond forming. Bond forming produces energy. An exothermic reaction in terms of bond breaking and bond forming is described as energy given out during bond forming is greater than energy taken in during bond breaking. When explaining this, you will need to name the reactants and the products involved in the reaction. Jenny from Miracle Learning Centre asks, “Why do we need to learn about exothermic reactions?” Mrs Lew, chemistry teacher at Miracle Learning Centre replied,”Exothermic reactions are very common in our daily life. An example is when acid reacts with alkali in a neutralisation reaction. When hydrochloric acid reacts with sodium hydroxide, sodium chloride and water are formed. When a thermometer is placed in the beaker when sodium hydroxide is added to hydrochloric acid, it measures an increase in temperature. This shows that it is an exothermic reaction. A temperature rise is recorded. Another example is the reaction between sodium and water. When sodium reacts with water, sodium hydroxide and hydrogen are formed. It gives out energy to the surrounding. Another common example of an exothermic reaction is combustion. When carbon burns in oxygen, it gives out energy to the surrounding. This results in the temperature rising in the surrounding. Production of ammonia gas is also an example of an exothermic reaction.”
Miracle Learning Centre aims to educate students about exothermic reactions. Do come to Miracle Learning Centre for more chemistry tuition lessons to learn more about exothermic reactions.
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