Answer to Question #232093 in Molecular Physics | Thermodynamics for Unknown346307

Question

A hot plate 1 m × 1.5 m is maintained at 300°C. Air at 25°C blows over the

plate. If the convective heat transfer coefficient is 20 W/m2°C, calculate the rate of heat transfer

Answer 1

Rate of heat transfer:

$Q = hAΔT \\ h=20 \;W/m^2 \cdot C \\ A= 1 \times 1.5 = 1.5 \;m^2 \\ ΔT = 300-25=275 \; °C \\ Q = 20 \times 1.5 \times 275 = 8250 \;W$

Answer: 8250 W