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What does one mean by exothermic and end...

What does one mean by exothermic and endothermic reactions ? Give examples.

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Exothermic reactions : Those reactions in when energy is released are called exothermic reactions.
Examples : (i) All combustion reactions like
`CH_4 + 2O_2 to CO_2 + 2H_2O + "Heat"`
(ii) Thermite reactions like
`2Al + Fe_2O_3 to 2Fe + Al_2O_3 + "Heat"`
Endothermic reactions : Those reactions in when energy is utilised are called endothermic reactions.
`CaCO_3 overset("heat")(rarr) CaO + CO_2`
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NAND LAL PUBLICATION-CHEMICAL REACTIONS AND EQUATIONS-EXERCISES
  1. Write the balanced chemical equation for the following reaction: Alum...

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  2. Write the balanced chemical equation for the following reaction: Bariu...

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  3. Write the balanced chemical equation for the following reaction and id...

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  4. Write the balanced chemical equation for the following reaction and id...

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  5. Write the balanced chemical equation for the following reaction and id...

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  6. Write the balanced chemical equation for the following reaction and id...

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  7. What does one mean by exothermic and endothermic reactions ? Give exam...

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  8. Why is respiration considered as an exothermic reaction?explain

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  9. Why are decompositon reactions called opposite of combination reaction...

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  10. Write one equation each for decomposition reactions where energy is su...

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  11. What is the difference between the displacement and double displacemen...

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  12. In the refining of silver,the recovery of silver from silver nitrate s...

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  13. What do you mean by precipitation reaction?explain by giving examples

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  14. Explain the following in terms of gain or loss of oxygen with two exam...

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  15. Explain the following in terms of gain or loss of oxygen with two exam...

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  16. A shiny brown coloured element x on heating in air becomes black in co...

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  17. Why do we apply paint on iron articles?

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  18. Oil and fat containing food items are flushed with nitrogen why?

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  19. Explain the following term with one example : Corrosion

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  20. Explain the following term with one example : Rancidity.

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