Aligarh Muslim University (AMU) 2011 B.Sc Chemistry (Hons) Physical Chemistry-Part 2 - Question Paper
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2010-2011 B.Sc. (HONS.) (PART - II) EXAMINATION (CHEMISTRY)
PHYSICAL CHEMISTRY (CH-213)
Maximum Marks: 27 Duration: Two Hours
Note: (i) Answer all questions.
(ii) The terms have their usual meanings.
(iii) Calculator is allowed.
1. Answer any two parts:
(a) Derive the relations between temperature and volume, and that between (3.5) temperature and pressure in reversible adiabatic expansion of an ideal gas.
(b) Derive Kirchhoff s equation to show the temperature dependence of enthalpy. (3.5)
(c) One mole of an ideal mono-atomic gas at 27C expands reversibly and (3.5) adiabatically from a volume of 10 dm3 to volume of 20 dm3. Calculate the amount of the work done by the gas.
2. Answer any two parts :-
Derive an expression for the entropy of mixing of two ideal gases at a constant (3.5) temperature.
(b) Explain the Nemst heat theorem. How does it lead to the enunciation of the (3.5) Third Law of Thermodynamics.
(pY Derive an expression for the entropy change accompanying variation of (3.5) temperature (T) and Volume (V) for an ideal gas.
Answer any two parts:
Derive the phase rule and explain various terms involved in it. (03)
Draw and describe the phase diagram for two component system in which the (03) two components form a eutectic mixture.
Jjz) Derive Clausius - Clapeyron equation. (03)
4. Answer any two parts:
(a) What is meant by transport number of an ion? Describe one method for its (3.5) determination.
(b) Explain the terms Asymmetric Effect and Electrophoratic Effect with (3.5) reference to the Debye - Huckel theory of strong electrolytes.
(c) Explain the trends of variation of molar conductance with change in (3.5) concentration for strong and weak electrolytes.
/4d) Describe the working of a metal-insoluble metal salt electrode taking an (3.5) example.
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