Effect of Cooling Rate on Thermal Conductivity
Two materials, P and Q, have the same chemical composition but different thermal conductivities. Material P was formed by rapid cooling, while Material Q was formed by slow cooling. Which statement best explains the difference in their thermal conductivities?
A
Cooling rate affects specific heat but not thermal conductivity
B
Material Q likely has higher conductivity due to fewer crystal defects
C
Material P has higher conductivity due to smaller grain size
D
Both materials must have identical conductivity since composition is the same
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