Chapter 6, Problem 6.77P

Interpretation Introduction

Interpretation:

Determine the temperature and pressure of the resulting air stream if it is formed by the stream of air mixed with another stream of air.

Concept Introduction:

Since given problem is associated with heat effects in an ideal gas, so we consider sensible heat effects in ideal gas equation for mechanically reversible process which is defined as:

  $Q=\Delta H={\displaystyle \underset{T_1}{\overset{T_2}{\int }}{C}_{P}dT}$                   ....(1)

And

for an ideal gas mixing

  $\Delta S=\Delta S_1+\Delta S_2$

And for an ideal gas$\Delta S=n\left(C_p\ln \frac{T_2}{T_1}-R\ln \frac{P_2}{P_1}\right)$