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April 25, 2014

Homework Help: Science

Posted by Sejul on Sunday, September 2, 2012 at 2:55pm.

A 10 lb. frozen boneless roast needs to be thawed and baked to a temperature of 200 degrees F.
The storage freezer maintains a temperature of -10 degrees F.
Pork changes from solid to a thawed state at 30 degrees F and has the following properties:
Heat Capacity "c" (frozen) = 0.50 BTU/(lb x F degrees)
"c" thawed = 1.2 BTU/(lb. x F degrees)
Heat of fusion (hf) = 125 BTU/lb.

How many BTUs does it take to bring the roast to a tasty 200 degrees F?

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