Types Of Chemical Reactions
Chapter Name : Chemical Reactions And Equations |
Sub Topic Code : 102_10_01_02_01 |
Topic Name : Types Of Chemical Reactions |
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Sub Topic Name : Combination Reaction |
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Introduction
New Products are formed by making and breaking of bonds Combination reaction is when two or more substances combine to form a single substance. Heat releasing reactions are called exothermic reactions.
Pre-Requisites:
Reaction, reactants, products
Activity:
Respiration is an exothermic reaction.
Real Life Question:
Why do newly whitewashed walls shine?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Chemical change | When two or more substances react to form new substances. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Add CaO to water | When quick lime, CaO dissolves in water, heat is released and the beaker or container warms up. This reaction is exothermic. |
Real life uses :
Exothermic reactions like respiration help us to take energy from food.
Places to visit :
Kitchen, whitewashing.
Practical examples around us
| Examples | Explainations |
|---|---|
| Respiration | When we breathe the glucose we take from food breaks down and combines with oxygen to give energy. |
What you learn in Theory:
New Products are formed by making and breaking of bonds. Combination reaction is when two or more substances combine to form a single substance. Heat releasing reactions are called exothermic reactions.
What you learn in Practice:
Respiration releases heat.