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青州's Question
Chemistry
Posted 9 months ago

explain the properties that dtermine the a metals conductivity with references to the effects with temperature
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Answer from Sia
Posted 9 months ago
Solution
1
Metallic Bonding: The conductivity of a metal is largely determined by its metallic bonding, where electrons are free to move throughout the metal's lattice structure
2
Electron Mobility: High conductivity in metals is due to the high mobility of delocalized electrons that can carry electrical current
3
Temperature Effects: As temperature increases, the vibrations of the metal ions in the lattice increase, which can scatter the electrons more, leading to a decrease in conductivity. The relationship can be expressed as ρ=ρ0[1+α(TT0)]\rho = \rho_0[1 + \alpha(T - T_0)], where ρ\rho is the resistivity, α\alpha is the temperature coefficient of resistivity, TT is the temperature, and T0T_0 is a reference temperature
Answer
The conductivity of a metal is determined by its metallic bonding and the mobility of delocalized electrons. Temperature increases lead to increased lattice vibrations, which can scatter electrons and decrease conductivity.
Key Concept
Metallic conductivity and temperature dependence
Explanation
Conductivity in metals is due to free electrons. Higher temperatures increase lattice vibrations, which interfere with electron flow, reducing conductivity.

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