For a process to occur spontaneously,

  • A
    only the entropy of the system must increase
  • B
    only the entropy of the surroundings must increase
  • C
    either the entropy of the system or that of the surroundings must increase
  • D
    the total entropy of the system and the surroundings must increase

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The enthalpy of vaporization of benzene is $30.779 \ kJ/mol$ and its boiling point is $353 \ K$. Find the change in entropy for the conversion of liquid benzene to its vapour at that temperature.

Enthalpy of vaporization of benzene is $+35.3 \ kJ \ mol^{-1}$ at its boiling point,$80^{\circ} C$. The entropy change in the transition of the vapour to liquid at its boiling point in $[J \ K^{-1} \ mol^{-1}]$ is

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