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The normal freezing point of n-octane (C8H18) is -57 °C.

(a) Is the freezing of n-octane an endothermic or exothermic process?

(b) In what temperature range is the freezing of n-octane a spontaneous process?

(c) In what temperature range is it a nonspontaneous process?

(d) Is there any temperature at which liquid n-octane and solid n-octane are in equilibrium? Explain.

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