Question

An amount of power, say 1000 kW, comes from a furnace at 800°C going into water vapor at 400°C. From the water the power goes to a solid metal at 200°C and then into some air at 70°C. For each location calculate the flux of s through a surface as (Q /T). What makes the flux larger and larger?

Answer 1

T₁        =>  T₂      => T₃      => T₄

furnace   vapor     metal         air 

₁S₂ gen for every change in T 

Q over ∆T is an irreversible process