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Math Help - extothermic reactions

  1. #1
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    extothermic reactions

    I have to find out which is true of exothermic reactions:
    - Enthalpy of reactants is greater than enthalpy of products.
    - Enthalpy of reactants is equal to the enthalpy of products.
    - Enthalpy of reactants is less than enthalpy of products.
    - Energy is used in an exothermic reaction.
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  2. #2
    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by Seza<3 View Post
    I have to find out which is true of exothermic reactions:
    - Enthalpy of reactants is greater than enthalpy of products.
    - Enthalpy of reactants is equal to the enthalpy of products.
    - Enthalpy of reactants is less than enthalpy of products.
    - Energy is used in an exothermic reaction.
    See this

    It answers all your questions, I believe
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  3. #3
    Newbie Siva's Avatar
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    I guess the first solution is true.
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  4. #4
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    Yep. An exothermic reaction is essentially telling you that \Delta H^{\circ}_{\text{rxn}} < 0, i.e. the change in enthalpy is negative. So the reactants are at a higher energy state than the products.
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