Thermal conductivity is a material property. It will not differ with the dimensions of a material, but it is dependent on
the temperature, the density and the moisture content of the material
. The thermal conductivity of a material depends on its temperature, density and moisture content.
What does conductivity depend on?
It depends on the
concentration, mobility
, the valence state of the ionized species in a solution, and the temperature at which a measurement is taken. The higher the concentration of the ions in water, the higher the conductivity.
Does conductivity depend on amount of material?
It will not differ with the dimensions of a material, but it is dependent on
the temperature, the density and the moisture content of the material
. The thermal conductivity of a material depends on its temperature, density and moisture content.
What determines the conductivity of a material?
The electrical conductivity of a metal (or its reciprocal, electrical resistivity) is determined by
the ease of movement of electrons past the atoms under the influence of an electric field
.
Which factor affects the conductivity of a material?
There are three main factors that affect the conductivity of a solution:
the concentrations of ions, the type of ions, and the temperature of the solution
.
What happens when conductivity increases?
In the SWMP data, a higher conductivity value indicates
that there are more chemicals dissolved in the water
. Conductivity measures the water’s ability to conduct electricity. It is the opposite of resistance.
What factors do not affect conductivity?
The factor which is not affecting the conductivity of any solution is.
Dilution
, temperature and nature of electrolyte affect the conductivity of solution.
Which material has highest conductivity?
Silver
has the highest electrical conductivity of all metals. In fact, silver defines conductivity – all other metals are compared against it. On a scale of 0 to 100, silver ranks 100, with copper at 97 and gold at 76.
How does conductivity depend on temperature?
The conductivity invariably increases with increasing temperature, opposite to metals but similar to graphite. It is affected by
the nature of the ions, and by viscosity of the water
. … All these processes are quite temperature dependent, and as a result, the conductivity has a substantial dependence on temperature.
Does conductivity depend on ion size?
Radius decreases, smaller ions carrying current in small area, more associations with anions & due to this, the ions become heavy & they move with reduced speed as compared to less associated ones, & thus
conductivity decreases
.
Does thermal conductivity depend on density?
Thermal conductivity is a material property. It will not differ with the dimensions of a material, but it is dependent on
the temperature
, the density and the moisture content of the material. The thermal conductivity of a material depends on its temperature, density and moisture content.
Does conductivity increase with length?
1. Length , L:
As length increases the conductance decreases
. 2. Area of the cross-section , A: As area of cross-section increases the conductance increases.
On which factor does the value of thermal conductivity depends?
The thermal conductivity of a specific material is highly dependent on a number of factors. These include
the temperature gradient
, the properties of the material, and the path length that the heat follows.
Can conductivity change indicate pollution?
A sudden increase or decrease in conductivity in a body of water
can indicate pollution. Agricultural runoff or a sewage leak will increase conductivity due to the additional chloride, phosphate and nitrate ions
1
.
What happens to conductivity when temperature increases?
-When we increase the temperature,
the kinetic energy of the ions increases and they move faster i.e. they conduct their bearing charge faster
and thus result in increased conductivity. So, with increase in temperature, the conductivity of electrolytic conductors increases.
What affects water conductivity?
Conductivity in water is affected by the presence of
inorganic dissolved solids such
as chloride, nitrate, sulfate, and phosphate anions (ions that carry a negative charge) or sodium, magnesium, calcium, iron, and aluminum cations (ions that carry a positive charge).
