Monday, January 12, 2009

How to Calculate Changes in Thermal Energy

Q=m x (delta)T x Cp
Q=change in thermal energy
m=mass
(delta)T=change in temperature (Tf-Ti)
Cp=specific heat of substance
Example:
32 gram silver spoon
60(degrees)C to 20(degrees)C
Q=m x (delta)T x Cp
Q=.032 x -40(degress)C x 235j/kg.k
Q=-300.8

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