Please write your solution clearly and specifically Carbon d

Please write your solution clearly and specifically

Carbon dioxide gas in a closed system changes from 100 degree F and 20 psi to 400 degree F and 40 psi. Entropy produced per mass during the process is equal to 0.15 Btu/lbm degree R. Evaluate the heat transfer per mass if the boundary temperature is 260 degree F.

Solution

T₁ = 100 F, T₂ = 400 F

We know dQ= Tds

Now, dq₁= T1ds, dq₁= 100*0.15= 15

  dq₂= T₂ds, dq₂= 400*0.15= 60

dQ= (dq₂-dq₁)

= 60-15

Answer = 45