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Homework Help: Reaction Chemistry

  1. Jan 10, 2005 #1
    Hello all

    Let's say we are given:

    [tex]CH_4 + 2O_2 \rightarrow CO_2 + 2H_2O[/tex]

    We want to find [tex] \Delta_H [/tex] for the entire reaction.

    Would I just use the formula:

    [tex] \sum _i \Delta_H_i - \sum _j \Delta_H_j [/tex]? In other words just look up enthalpies in book and subtract enthalpy of reactants from enthalpy of products?

  2. jcsd
  3. Jan 10, 2005 #2


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    IIRC,that's how it goes.To find the reaction enthalpy,u need to know the creation enthalpies for each of the components from the reaction.Pay attention with the signs.

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