Exam (elaborations)
Chemical Engineering Thermodynamics Questions with Correct Answers
- Course
- Institution
Chemical Engineering Thermodynamics Questions with Correct Answers
[Show more]
Content preview
Chemical Engineering Thermodynamics Questionswith Correct Answers
Maximum work that could be secured by expanding the gas over a given
pressure range is the__________work. Correct Answer-isothermal
Internal energy change of a system over one complete cycle in a cyclic
process is Correct Answer-zero
Heating of water under atmospheric pressure is an __________ process.
Correct Answer-isobaric
Van Laar equation deals with the activity co-efficients in Correct
Answer-binary solutions
High __________ is an undesirable property for a good refrigerant.
Correct Answer-viscosity
Solubility of a substance which dissolves with an increase in volume and
liberation of heat will be favoured by the Correct Answer-low pressure
and low temperature.
Entropy is a measure of the __________ of a system. Correct Answer-
disorder
A chemical reaction will occur spontaneously at constant pressure and
temperature, if the free energy is Correct Answer-negative
,Fundamental principle of refrigeration is based on the __________ law
of thermodynamics. Correct Answer-second
For a spontaneous process, free energy Correct Answer-decreases
whereas the entropy increases
A refrigeration cycle is a reversed heat engine. Which of the following
has the maximum value of the co-efficient of performance (COP) for a
given refrigeration effect? Correct Answer-Carnot refrigeration cycle.
In a working refrigerator, the value of COP is always Correct Answer-
>1
__________ increases with increase in pressure. Correct Answer-The
melting point of wax; The boiling point of a liquid
A refrigerator may be termed as a Correct Answer-heat pump
For a stable phase at constant pressure and temperature, the fugacity of
each component in a binary system __________ as its mole fraction
increases. Correct Answer-increases
Which of the following is not an intensive property? Correct Answer-
Heat capacity
,Out of the following refrigration cycles, which one has the minimum
COP (Co-efficient of performance)? Correct Answer-Air cycle
Measurement of thermodynamic property of temperature is facilitated by
__________ law of thermodynamics. Correct Answer-zeroth
The theoretical minimum work required to separate one mole of a liquid
mixture at 1 atm, containing 50 mole % each of n- heptane and n- octane
into pure compounds each at 1 atm is... Correct Answer--RT ln 0.5
Keeping the pressure constant, to double the volume of a given mass of
an ideal gas at 27°C, the temperature should be raised to __________
°C. Correct Answer-327
Entropy of an ideal gas depends upon its Correct Answer-Pressure and
Temperature
Isobaric process means a constant process. Correct Answer-pressure
No work is done by the system, when a reaction occurs at constant
Correct Answer-volume
If the vapour pressure at two temperatures of a solid phase in
equilibrium with its liquid phase are known, then the latent heat of
fusion can be calculated by the Correct Answer-Clayperon-Claussius
equation
, The freezing point of a liquid decreases when the pressure is increased,
if the liquid __________ while freezing. Correct Answer-contracts
"At the absolute zero temperature, the entropy of every perfectly
crystalline substance becomes zero". This follows from the Correct
Answer-third law of thermodynamics
During Joule-Thomson expansion of gases Correct Answer-enthalpy
remains constant.
The accentric factor of a materical, 'ω', is defined as ω = -
log10(Prsat)Tr-1 = 0.7, where, Prsat = reduced vapor pressure, Tr =
reduced temperature. The value of accentric factor is always Correct
Answer-< 1
Degrees of freedom at triple point will be Correct Answer-0
"Law of corresponding states" says that Correct Answer-two different
gases behave similarly, if their reduced properties (i.e. P, V and T) are
same.
Linde gas liquefaction process employs cooling Correct Answer-by
throttling
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller cracker. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $13.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
71498 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now