Question
Chemistry Question on Electrochemistry
The values of conductivity of some materials at 298.15K in S m−1 are:
2.1×103,1.0×10−16,1.2×101,3.91,1.5×10−2,1×10−7,1.0×103.
The number of conductors among the materials is ______.
Answer
The materials can be categorized as conductors, insulators, and semiconductors based on their conductivity values at 298.15 K.
Conductors generally have conductivities on the order of 102 to 106S m−1.
Insulators have very low conductivities, typically around 10−10 to 10−8S m−1.
Semiconductors have conductivities ranging from 10−4 to 10S m−1.
Given values:
2.1×103,1.2×103,3.91,1.5×10−2,1×10−7,1.0×103
Classifying each:
- 2.1×103,1.2×103,and1.0×103 are in the conductor range.
- 3.91 also falls within the conductor range (upper range of semiconductors).
- 1.5×10−2 represents a semiconductor.
- 1×10−7 represents an insulator.
Therefore, the number of conductors is: 4.