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Chemistry / Elementary Principles of Chemical Processes 3 / Chapter 8 / Problem 8.18

Elementary Principles of Chemical Processes | 3rd Edition | ISBN: 9780471687573 | Authors: Richard M Felder

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A liquid mixture of30 wt% acetone and 70 wt'Yo

Chapter 8, Problem 8.18

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QUESTION:

A liquid mixture of30 wt% acetone and 70 wt'Yo 2-methyl-1-pentanol (C6H14 0) is cooled from 45C to 20e. Calculate the associated specific enthalpy change in Jig, using Kopp's rule to estimate any heat capacity for which a tabulated value cannot be found. State all assumptions you make

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QUESTION:

A liquid mixture of30 wt% acetone and 70 wt'Yo 2-methyl-1-pentanol (C6H14 0) is cooled from 45C to 20e. Calculate the associated specific enthalpy change in Jig, using Kopp's rule to estimate any heat capacity for which a tabulated value cannot be found. State all assumptions you make

ANSWER:

Step 1 of 4

A solution is obtained by mixing acetone and 2-methyl-1-pentanol . The obtained solution mixture is cooled from to .

The equation to calculate the enthalpy of the total solution is,

.........(1)

Here, is heat of mixing

is weight fraction of component

is enthalpy of pure .

Assume the mixture of acetone and 2-methyl-1-pentanol forming an ideal solution.

For an ideal mixture, the heat of mixing would be zero.

Thus, the heat of mixing is negligible.

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