Chapter 10, Problem 10.37P

Interpretation Introduction

(a)

Interpretation:

Rate of heat transfer using an energy balance equation should be determined.

Concept Introduction:

The energy balance for the mixing process is given as:

  $\Delta H_{mix}\stackrel{.}{m}=\stackrel{.}{Q}+\stackrel{.}{W}$

where, $\Delta H_{mix}$ is enthalpy of mixing, $\stackrel{.}{m}$ is molar flow rate of the mixture, $\stackrel{.}{Q}$ is rate of heat transfer, and $\stackrel{.}{W}$ is power requirement.

Interpretation Introduction

(b)

Interpretation:

Rate of entropy generation W.K-1 should be determined.

Concept Introduction:

Mixture of n-octane and iso-octane will form an ideal solution being similar in nature. For an ideal solution, $\Delta S^{id}=-R{\displaystyle \sum _i{x}_i}\ln x_i$ .

where $\Delta S^{id}$ is entropy of ideal gas, R is gas constant, and $x_i$ is the mole fraction.