Which of the following statements is true?

  • A
    $\Delta E$ is always greater than $\Delta H$
  • B
    $\Delta E$ is always less than $\Delta H$
  • C
    $\Delta E$ may be lesser or greater or equal to $\Delta H$
  • D
    $\Delta E$ is always proportional to $\Delta H$

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Explain free expansion.

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