Moderate

Cox chart, which is useful in the design of distillation column particularly for petroleum hydrocarbons, is a plot of (where, P = vapor pressure, T = temperature) ?

Correct answer: A. log P vs. T

  • A. log P vs. T
  • B. log P vs. log T
  • C. T vs. P
  • D. P vs. log T

Explanation

A Cox chart plots the logarithm of vapour pressure against temperature, commonly using log P versus T. It is especially useful for estimating vapour-pressure behaviour of petroleum fractions in distillation design.

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