Thermodynamics for Chemical Mcqs

Q.  During a reversible isothermal expansion of an ideal gas, the entropy change is___________________?

a. +ve
b. 0
c. -ve
d.


ANSWER: See Answer
 
No explanation is available for this question!
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MCQs:  In an ideal refrigeration cycle, the change in internal energy of the fluid is_____________?
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MCQs:  Melting of ice is an example of an _____________ process?
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MCQs:  Which of the following equations is used for the prediction of activity co-efficient from experiments ?
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MCQs:  A system undergoes a change from a given initial state to a given final state either by an irreversible process or by a reversible process, then (where, Δ S1 and Δ SR are the entropy changes of the system for the irreversible and reversible processes respectively) ?
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MCQs:  The expression for the work done for a reversible polytropic process can be used to obtain the expression for work done for all processes, except reversible _____________ process?
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MCQs:  Measurement of thermodynamic property of temperature is facilitated by ____________ law of thermodynamics?
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MCQs:  Refrigeration cycle_________________?
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MCQs:  In the reaction, C + O2 → CO2; ΔH = – 94 kcal. What is the heat content (enthalpy) of O2 ?
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MCQs:  On a P-V diagram of an ideal gas, suppose a reversible adiabatic line intersects a reversible isothermal line at point A. Then at a point A, the slope of the reversible adiabatic line (∂P/∂V)s and the slope of the reversible isothermal line (∂P/∂V)T are related as (where, y = Cp/Cv) ?
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MCQs:  “At the absolute zero temperature, the entropy of every perfectly crystalline substance becomes zero”. This follows from the __________________?
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MCQs:  In case of vapour compression refrigeration system, elevating the evaporator temperature (keeping the condenser temperature constant) results in_____________?
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MCQs:  Which of the following identities can be most easily used to verify steam table data for superheated steam ?
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MCQs:  The third law of thermodynamics states that the__________________?
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MCQs:  1st law of thermodynamics is nothing but the law of conservation of___________________?
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MCQs:  Vapour which is at a pressure smaller than the saturation pressure for the temperature involved is called a _____________ vapour?
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MCQs:  High pressure steam is expanded adiabatically and reversibly through a well insulated turbine, which produces some shaft work. If the enthalpy change and entropy change across the turbine are represented by ΔH and ΔS respectively for this process ?
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MCQs:  Compressibility factor for almost all the gases are approximately same at the same__________________?
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MCQs:  Which of the following will increase the volume of a real gas by four times ?
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MCQs:  Gibbs phase rule finds application, when heat transfer occurs by___________________?
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MCQs:  In jet refrigerators, the refrigerating fluid is practically always_________________?
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