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What is an exothermic change?...

What is an exothermic change?

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Knowledge Check

  • Evaporation of water is: a process in which heat is neither evolved nor absorbed a process accompanied by chemical reaction an exothermic change an endothermic change.

    A
    a process in which heat is neither evolved nor absorbed
    B
    a process accompanied by chemical reaction
    C
    an exothermic change
    D
    an endothermic change.

  • Which of the following reactions is not exothermic ?

    A
    `CH_3 - Cl + CH_3 – CH_2 rarr CH_4 + CH_3 – CH_2-Cl`
    B
    `CH_3 - Cl + (CH_3)_3 C-H rarr CH_4 + (CH_3)_3 – C-Cl`
    C
    `CH_3 - Cl + CH_2= CH-CH_3 rarr CH_4 + CH_2=CH-CH_2-Cl`
    D
    `CH_3 - Cl + CH_2=CH_2 rarr CH_4+CH_2=CHCl`

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