In an ideal gas mixture, fugacity of a species is equal to its

A Vapor pressure
B Partial pressure
C Chemical potential
D None of these

Correct Answer: Partial pressure

Fugacity for ideal gas mixture is equal to its partial pressure but for a real gas mixture it is not equal to partial pressure higher the difference between fugacity and partial pressure higher is the non-ideality actually the fugacity coefficient acts as a measure of non-ideality.
Bissoy MCQ
#Chemical Engineering #Chemical Engineering Thermodynamics

Related Questions

Fugacity of a component in an ideal gas mixture is euqal to the partial pressure of that component in the mixture. The fugacity of each component in a stable homogeneous solution at contant pressure and temperature __________ as its mole fraction increases.
A Decreases
B Decreases exponentially
C Increases
D Remains constant
"The fugacity of a gas in a mixture is equal to the product of its mole fraction and its fugacity in the pure state at the total pressure of the mixture". This is
A The statement as per Gibbs-Helmholtz
B Called Lewis-Randall rule
C Henry's law
D None of these
Free energy, fugacity and activity co-efficient are all affected by change in the temperature. The fugacity co-efficient of a gas at constant pressure ____with the increase of reduced temperature.
A Decreases
B Increases
C Remains constant
D Decreases logarithmically
Fugacity co-efficient of a substance is the ratio of its fugacity to
A Mole fraction
B Activity
C Pressure
D Activity co-efficient
The standard state of a gas (at a given temperature) is the state in which fugacity is equal to
A Unity
B Activity
C Both A & B
D Neither A nor B
Fugacity and pressure are numerically equal, when the gas is
A In standard state
B At high pressure
C At low temperature
D In ideal state
With increase in reduced temperature, the fugacity co-efficient of a gas at constant reduced pressure
A Increases
B Decreases
C Remains same
D Decreases linearly
STP-তে একটি আদর্শ গ্যাসকে প্রথমে তার প্রাথমিক আয়তনের এক-তৃতীয়াংশে সংকুচিত করা হয়, এবং তারপর প্রসারিত হতে দেওয়া হয় যতক্ষণ না তার চাপ প্রাথমিক চাপের অর্ধেক হয়। উভয় প্রক্রিয়ায় গ্যাসের তাপমাত্রা স্থির থাকে। যদি গ্যাসের প্রাথমিক অভ্যন্তরীণ শক্তি । হয়ে থাকে তাহলে এর চূড়ান্ত অভ্যন্তরীণ শক্তি কত? (An ideal gas at STP is first compressed to one-third of its initial volume and then allowed to expand until its pressure is half the initial pressure. The temperature of the gas remains constant during both the processes. If the initial internal energy of the gas is U, what is its final internal energy?)
A U/3
B U/2
C U
D 2U/3
Fugacity and pressure are numerically not equal for the gases
A At low temperature and high pressure
B At standard state
C Both A and B
D In ideal state
দুটি এক-পরমাণুক আদর্শ গ্যাস পরস্পরের সাথে তাপীয় সাম্যাবস্থায় আছে। A গ্যাস m ভরের অণু দ্বারা গঠিত, এবং B গ্যাস 4m ভরের অণু দ্বারা গঠিত। A গ্যাসের আয়তন ৪ গ্যাসের আয়তনের দ্বিগুণ। এদের চাপের অনুপাত PA / PB কত? (Two monoatomic ideal gases are in thermal equilibrium with each other. Gas A is composed of molecules with mass m while gas B is composed of molecules with mass 4m. The volume of gas A is twice that of gas B. What it the ratio of their pressures PA / PB ?)
A 1/4
B 1/2
C 1
D 2

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