APFIVE Effect of Cooling Rate on Thermal Conductivity
Two materials with identical chemical composition exhibit different thermal conductivities. Material P was rapidly cooled during manufacturing while Material Q was slowly cooled. Which statement correctly explains the likely difference in their thermal conductivities?
A
Material P has higher conductivity due to smaller grain size
B
Cooling rate affects specific heat but not thermal conductivity
C
Both materials must have identical conductivity since composition is the same
D
Material Q likely has higher conductivity due to fewer crystal defects
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