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A reaction releases 100 kilojoules per mole and the mixture has a heat capacity of 200 joules per mole kelvin. What is the adiabatic temperature rise at complete conversion?

  • A.50 kelvin
  • B.0.5 kelvin
  • C.20000 kelvin
  • D.500 kelvin

Answer: D

One hundred thousand joules divided by two hundred joules per kelvin gives five hundred kelvin. A rise of that size would be quite unmanageable without either dilution or heat removal. The number characterises the hazard in one figure.

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