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How many joules of energy are absorbed when 250 g Pb is heated from 25 C to 245 C?
Wiki User
∙ 14y ago
The specific heat capacity of lead, Cg = 0.130 J g-1 K-1
The specific heat capacity is a measure of how many joules of energy it takes to raise one gram of the substance one degree. Kelvin is a temperature scale that has the same graduations as Celsius (Centigrade) but starts at -273.15 below 0oC.
Energy = Cg x mass x change in temperature
= 0.130 x 250 x 220
= 7150 J g-1 K-1
or 7.15 kJ g-1 K-1
Wiki User
∙ 14y ago
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