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## Homework Statement

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.

## Homework Equations

**Sensible Heat:**

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

**Latent heat:**

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!

Candii ^__^

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