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December 20, 2014

December 20, 2014

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

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?

- Science -
**DrBob222**, Sunday, September 2, 2012 at 6:47pmq1 is heat from -10 to 30

q1 = mass x specific heat of frozen x (Tfinal-Tinitial)

q2 = heat at 30 to thaw at 30.

q2 = mass x heat fusion

q3 = heat from 30 to 200

q3 = mass x specific heat of thawed x (Tfinal-Tinitial)

Total heat = q1 + q2 + q3

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