(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A girl wishes to make a lead casting of an object which will require 2kg of melted lead. if the lead was stored in her basement at approximately 55 degrees F, and it is melted to a 1/4" thick steel pot of approximate cross sectional area of 12in^2, how long will it take to melt the lead if its placed in a kiln at 617.5 degrees F, the melting point of lead?

2. Relevant equations

Q=mc delta t

Q=mc

Constants for lead: Lf=.25E5 J/kg Lv=8.7E5 J/kg c=130J/kgCelsius

Constants for steel: k=40 J/s times m times Celsius

3. The attempt at a solution

Q=2(130)(562.5)

Q=1.46E5

Qv=2(8.7E5)

Qv=1.74E6

Qf=2(.25E5

Qf=50000

Not sure where else to go from here...

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# Homework Help: Heat question

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