Decomposition reactions require energy either in the form of heat or light or electricity forbreaking down the reactants. Write one equation each for decomposition reactions whereenergy is supplied in the form of heat, light and electricity.

What is a decomposition reaction? Give 2 examples each of decomposition taking placedue to heat, light and electricity

Describe the difference between composition and decomposition reactions.

1Which of the following statements is true?Energy can be created, but not destroyedEnergy can be both created and destroyedEnergy cannot be created or destroyed; it can only be transferred from one form into anotherEnergy can be destroyed, but not created2What term is used to describe a reaction that releases energy to its surroundings?ExothermicThermal decompositionIrreversibleEndothermic3Which of the following is an example of an endothermic reaction?OxidationThermal decompositionNeutralisationCombustion4When investigating energy change in a reaction, why is the solution contained in a polystyrene cup?To prevent heat loss to the surroundingsTo enable heat to be lost to the surroundingsTo stop you burning your fingersTo warm up the solution5The reaction between citric acid and sodium hydrogen carbonate is endothermic. What would you expect to happen to the temperature of the solution?It would increaseIt would remain constantIt would oscillate up and downIt would decrease

1. The minimum amount of energy that is needed to start a chemical reaction is called ___________________________.2. A chemical reaction in which a substance combines with oxygen and releases energy is called ________________.3. A chemical reaction that releases thermal energy is called _____________________.4. Chemical reactions that absorb thermal energy are called ____________________.5. A __________________________________reaction in one in which the two negative ions in two compounds switch places, forming two new compounds.6. A chemical reaction in which one element replaces another element in a compound is called ____________________.7. A substance that increases reaction rate by lowering the activation energy of a reaction is called _______________.8. A __________________ reaction is one where one compound breaks down and forms two or more substances.9. A ___________________reaction is one in which two or more substances combine and form one compound.10. A substance that slows, or even stops a chemical reaction is called a ____________________.11. The starting substances in a chemical reaction are the ____________________.12. A ________________________________________ is a process in which atoms of one or more substances rearrange to form one or more new substances.13. The substances produced by the chemical reaction are the ______________________.14. A number placed in front of an element symbol or chemical formula in an equation is called a __________________.15. This states that the total mass of the reactants before a chemical reaction is the same as the total mass of the products after the chemical reaction. __________________________________________16. Breaking a chemical bond _____________ energy from the surroundings.17. Mass is conserved in a chemical reaction because ____________________________.18. Catalysts are _____________________________changed during chemical reactions.19. Chemical reactions can be sped up by doing what?20. How would you slow down a chemical reaction?

is it correct to say that a decomposition reaction is an endothermic process? explain