Home
Class 11
CHEMISTRY
Water decomposes by absorbing 286.2 kJ o...

Water decomposes by absorbing 286.2 kJ of electrical energy per mole. When `H_(2)` and `O_(2)` combine to form one mole of `H_(2)O, 286.2kJ` of heat is produced. Which law is proved ? What statement of the law followsfrom it?

Text Solution

Verified by Experts

Law of conservation of energy ( or 1st law of thermodynamics)
Def.Energy can neither be created or destroyed , although it may be converted from one formto another.
Promotional Banner

Topper's Solved these Questions

  • THERMODYNAMICS

    PRADEEP|Exercise CONCEPTUAL QUESTIONS( III.Enthalpy change and its relation with internal energy change)|13 Videos

  • THERMODYNAMICS

    PRADEEP|Exercise NCERT QUESTIONS AND EXERCISES WITH ANSWERS|22 Videos

  • THERMODYNAMICS

    PRADEEP|Exercise CONCEPTUAL QUESTIONS( I. General Introduction andsome basic terms and concepts)|4 Videos

  • STRUCTURE OF ATOM

    PRADEEP|Exercise Competition Focus (JEE (Main and Advanced)/Medical Entrance (IX. Assertion And Reason Type Questions (Type II))|12 Videos

Similar Questions

Explore conceptually related problems

The heat of formation of H_(2)O_((l)) is -286.2 kJ. The heat of formation of H_(2)O_((g)) is likely to be

One molee of methanol when burnt in O_(2) , gives out 723 kJ mol^(-1) of heat. If one mole of O_(2) is used, what will be the amount of heat evovled?

The number of electrons involved when 1 mole of H_(2)O_(2) decomposes as H_(2)O_(2) rarr H_(2)O +O_(2) , is

A: When 4 moles of H_(2) reacts with 2 moles of O_(2) , then 4. moles of water is formed. R: O_(2) will act as limiting reagent.

What is the charge in mass when 2 mole of hydroghen atoms combine to form 1 mole fo H_(2) molecule if: 2H rarr H_(2), Delta E = -436 kJ ? Comment on the result.

How many moles of H_(2)O are liberated when one mole hydrated MgCl_(2) is heated?

The heat of formation of water is 260 kJ . How much H_(2)O is decomposed by 130 kJ heat ?

Statement-1: Complete hydrolysis of one mole of peroxydisulphuric acid gives one mole of H_(2)O_(2) and moles of H_(2)SO_(4) . Statement-2: Peroxydisulphuric acid has one peroxy linkage.

Knowledge Check

  • One mole of methanol when burnt in O_(2) , gives out 723 kJ mol^(-1) heat. If one mole of O_(2) is used, what will be the amount of heat evolved

    A
    723 kJ
    B
    924 kJ
    C
    482 kJ
    D
    241 kJ

  • The heat of formation of H_(2)O_((l)) is -286.2 kJ. The heat of formation of H_(2)O_((g)) is likely to be

    A
    `-286.2 kJ`
    B
    `-290.78 kJ`
    C
    `-335.2 kJ`
    D
    `-242.76 kJ`

  • One molee of methanol when burnt in O_(2) , gives out 723 kJ mol^(-1) of heat. If one mole of O_(2) is used, what will be the amount of heat evovled?

    A
    723 kJ
    B
    924 kJ
    C
    482 kJ
    D
    241 kJ
    • PRADEEP-THERMODYNAMICS-CONCEPTUAL QUESTIONS( II. First law of thermodynamics)
    1. Water decomposes by absorbing 286.2 kJ of electrical energy per mole. ...

      Text Solution

      |