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Why is respiration considered an exother...

Why is respiration considered an exothermic reaction? Explain.

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Rice, potatoes and bread contain carbohydrates. During digestion, these carbohydrates are broken down into a simpler substance called glucose. Digestion follows respiration. During respiration, the glucose combines with oxygen in the cells of our body and provides energy. Thus, respiration is an exothermic process because energy is produced during this process.
`underset("Glucose")(C_(6)H_(12)O_(6))(aq)+6O_(2)(g)+6H_(2)O(l)rarr6CO_(2)(g)+12H_(2)O(l)+"Energy"`
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Why is repiration considered an exothermic reaction ? Explain.

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Knowledge Check

  • In exothermic reaction

    A
    Heat absorbed is given negative sign
    B
    Change in enthalpy is given positive sign
    C
    Heat evolved is given positive sign
    D
    None of these.

  • In exothermic reaction

    A
    `H_(R)= H_(P)`
    B
    `H_(R) gt H_(P)`
    C
    `H_(R) lt H_(P)`
    D
    `Delta H=0`

  • In an exothermic reaction

    A
    the energy of the reactants is more than that of the products.
    B
    the energy of the reactants is less than that of the products.
    C
    the energy of the reactants may be more or less than that of the products, depending on the temperature.
    D
    energy of the reactants and products are the same.

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