InterviewSolution
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InterviewSolution
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a) The conductivity of metals decreases while that of electrolytes increases with increase in tenmWhy?byatwhat nH ofHCLsution will Ha gas electrnde show electrode notential of-9.118 V? |
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Answer» We know that resistivity = m / (nte^2) and e are properties of electrons and remain constant. METALSIn metals, n i.e., the number of electrons in unit volume of the conductor is almost independent of temperature. However, t i.e., the relaxation time does vary with temperature. When temperature increases, the thermal speed of the electrons increases as well as, the amplitude of vibration of the positive ions inside the metal conductor also increase, about their mean positions. Thus, the collisions between the electrons and the positive metal ions become more frequent and this decreases the relaxation time, t, leading to an increase in the resistivity of the conductor. |
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