Exothermic reaction – A reaction in which heat is released is called the exothermic reaction. Burning of fuel is an example of exothermic reaction. When methane is burnt it gives heat along with carbon dioxide and water. CH4(g) + O2(g) → CO2(g) + H2O(l) + Heat Endothermic reaction – ARead more
Exothermic reaction – A reaction in which heat is released is called the exothermic reaction. Burning of fuel is an example of exothermic reaction. When methane is burnt it gives heat along with carbon dioxide and water.
CH4(g) + O2(g) → CO2(g) + H2O(l) + Heat
Endothermic reaction – A reaction in which heat is absorbed is called endothermic reaction. Example – When silver chloride is left in the sunlight, it absorbs heat and turns grey because of formation of silver metal.
In the course of respiration glucose is broken into carbon dioxide and energy is released. That’s why it is considered as an exothermic reaction. C6H12O6(aq)+6O2→6CO2(aq)+6H2O(I)+Energy
In the course of respiration glucose is broken into carbon dioxide and energy is released. That’s why it is considered as an exothermic reaction. C6H12O6(aq)+6O2→6CO2(aq)+6H2O(I)+Energy
In a combination reaction two or more substances are combined to form new substance while in the decomposition reaction one substance decomposes into two or more substances. Hence, the decomposition reactions are called opposite of combination reactions. Example of decomposition : (i) 2FeSO4(s) Read more
In a combination reaction two or more substances are combined to form new substance while in the decomposition reaction one substance decomposes into two or more substances. Hence, the decomposition reactions are called opposite of combination reactions.
When a more reactive element displaces a less reactive element from its salt solution, then it is called displacement reaction. While there is an exchange of ions between the reactants to produce new substances, it is called double displacement reaction. In displacement reaction one displacement takRead more
When a more reactive element displaces a less reactive element from its salt solution, then it is called displacement reaction. While there is an exchange of ions between the reactants to produce new substances, it is called double displacement reaction. In displacement reaction one displacement takes place. While in double displacement reaction two displacements takes place.
Displacement reaction Mg(s)+2HCl(aq)→MgCl2+H2(g)
What does one mean by exothermic and endothermic reactions? Give examples.
Exothermic reaction – A reaction in which heat is released is called the exothermic reaction. Burning of fuel is an example of exothermic reaction. When methane is burnt it gives heat along with carbon dioxide and water. CH4(g) + O2(g) → CO2(g) + H2O(l) + Heat Endothermic reaction – ARead more
Exothermic reaction – A reaction in which heat is released is called the exothermic reaction. Burning of fuel is an example of exothermic reaction. When methane is burnt it gives heat along with carbon dioxide and water.
CH4(g) + O2(g) → CO2(g) + H2O(l) + Heat
Endothermic reaction – A reaction in which heat is absorbed is called endothermic reaction. Example – When silver chloride is left in the sunlight, it absorbs heat and turns grey because of formation of silver metal.
2AgCl(s) Sunlight → 2Ag(s)+Cl₂(g)
See lessWhy is respiration considered an exothermic reaction? Explain.
In the course of respiration glucose is broken into carbon dioxide and energy is released. That’s why it is considered as an exothermic reaction. C6H12O6(aq)+6O2→6CO2(aq)+6H2O(I)+Energy
In the course of respiration glucose is broken into carbon dioxide and energy is released. That’s why it is considered as an exothermic reaction.
See lessC6H12O6(aq)+6O2→6CO2(aq)+6H2O(I)+Energy
Why are decomposition reactions called the opposite of combination reactions? Write equations for these reactions.
In a combination reaction two or more substances are combined to form new substance while in the decomposition reaction one substance decomposes into two or more substances. Hence, the decomposition reactions are called opposite of combination reactions. Example of decomposition : (i) 2FeSO4(s) Read more
In a combination reaction two or more substances are combined to form new substance while in the decomposition reaction one substance decomposes into two or more substances. Hence, the decomposition reactions are called opposite of combination reactions.
Example of decomposition :
(i) 2FeSO4(s) —Heat→ Fe2O3(s) + SO2(g) + SO3(g)
Example of combination :
(i) CaO(s) + CO2(g) → CaCO3(s)
See lessWhat is the difference between displacement and double displacement reactions? Write equations for these reactions.
When a more reactive element displaces a less reactive element from its salt solution, then it is called displacement reaction. While there is an exchange of ions between the reactants to produce new substances, it is called double displacement reaction. In displacement reaction one displacement takRead more
When a more reactive element displaces a less reactive element from its salt solution, then it is called displacement reaction. While there is an exchange of ions between the reactants to produce new substances, it is called double displacement reaction. In displacement reaction one displacement takes place. While in double displacement reaction two displacements takes place.
Displacement reaction
Mg(s)+2HCl(aq)→MgCl2+H2(g)
Double displacement reaction
See less2KBr(aq)+BaCl2→2Kl(aq)+BaBr3(s)
In the refining of silver, the recovery of silver from silver nitrate solution involved displacement by copper metal. Write down the reaction involved.
2AgNO3(aq)+Cu(s)→Cu(NO3)2(l)+2Ag(s)
2AgNO3(aq)+Cu(s)→Cu(NO3)2(l)+2Ag(s)
See less