Which of the following statements is correct about the heat of combustion?

  • A
    It may be exothermic in some cases and endothermic in other cases.
  • B
    It is applicable to gaseous substances only.
  • C
    It is always an exothermic reaction.
  • D
    Its value does not change with temperature.

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Similar Questions

In an exothermic reaction,$\Delta H$ is

The equation $\frac{1}{2} H_2 + \frac{1}{2} Cl_2 \to HCl$ $(\Delta H_{298} = -22.060 \ kcal)$ means:

$C_{(diamond)} + O_2 \to CO_2; \Delta H = -395.3 \ kJ/mole$
$C_{(graphite)} + O_2 \to CO_2; \Delta H = -393.4 \ kJ/mole$
$C_{(graphite)} \to C_{(diamond)}; \Delta H = ?$

For complete neutralization of $HCl$ with $NaOH,$ the heat of neutralization is ...... $kJ \ mol^{-1}$

The heat of formation of water is $260 \ kJ$. How much $H_2O$ is decomposed by $130 \ kJ$ of heat (in $mol$)?

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