In the heat exchanger shown in the accompanying diagram, a fluid flowing into the
exchanger’s outer pipe has a specific heat capacity of
.Fluid enters the pipe at the point 2 with a flow rate of
3.00 kg/s and at a
temperature of .The fluid
exits the pipe at the point 4 at a temperature of
.Another fluid with a
specific heat capacity of enters the exchanger’s inner pipe at the point 1. The
second fluid enters this pipe at a temperature of
and leaves the pipe at
the point 3, at a temperature of
. What is the flow rate of the fluid that moves through the inner pipe?