An electric furnace has dimensions 2m x 2m x 3m. When it reaches forging temperature of 1200°C, a 2t block of steel at 20°C is placed in the furnace. If there is a heat loss of 300W/m² from all surfaces, and a constant energy input of 20kW, calculate how long it will take before the steel can be forged.
Q = mcΔT = mc(T2 - T1)
Q = quantity of heat transfered (J)
m = mass of the material (kg)
c = specific heat capacity (J/kgK)
T1 = initial temperature (°C)
T2 = final temperature (°C)
ΔT = temperature difference (°C) = T2-T1
Q = mL
L = Latent heat
The Attempt at a Solution
Not quite sure how to attempt it >___< could someone please guide me in solving this?
Thank you for your help!