MCQ
Which of the following statements is correct about heat of combustion
  • A
    It may be exothermic in some cases and endothermic in other cases
  • B
    It is applicable to gaseous substances only
  • It is always an exothermic reaction
  • D
    Its value does not change with temperature

Answer

Correct option: C.
It is always an exothermic reaction
(c)$\Delta {H_{{\rm{combusion}}}}$ $= -ve, $ so exothermic process.

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