Thermodynamics for Chemical

When a gas is subjected to adiabatic expansion, it gets cooled due to__________________?

Byadmin March 11, 2019August 29, 2021

When a gas is subjected to adiabatic expansion, it gets cooled due to__________________?

A. Decrease in velocity
B. Decrease in temperature
C. Decrease in kinetic energy
D. Energy spent in doing work

Thermodynamics for Chemical

Vapour which is at a pressure smaller than the saturation pressure for the temperature involved is called a _____________ vapour?

Vapour which is at a pressure smaller than the saturation pressure for the temperature involved is called a _____________ vapour?

A. Superheated
B. Desuperheated
C. Non-condensable
D. None of these

Read More Vapour which is at a pressure smaller than the saturation pressure for the temperature involved is called a _____________ vapour?
Thermodynamics for Chemical

Free energy change of mixing two liquid substances is a function of the__________________?

Free energy change of mixing two liquid substances is a function of the__________________?

A. Concentration of the constituents only
B. Quantities of the constituents only
C. Temperature only
D. All A, B. and C

Read More Free energy change of mixing two liquid substances is a function of the__________________?
Thermodynamics for Chemical

Claude’s liquefaction process employs the cooling of gases by__________________?

Claude’s liquefaction process employs the cooling of gases by__________________?

A. Expansion in an engine
B. Following a constant pressure cycle
C. Throttling
D. None of these

Read More Claude’s liquefaction process employs the cooling of gases by__________________?
Thermodynamics for Chemical

A solute distributes itself between two non-miscible solvents in contact with each other in such a way that, at a constant temperature, the ratio of its concentrations in two layers is constant, irrespective of its total amount”. This is_________________?

A solute distributes itself between two non-miscible solvents in contact with each other in such a way that, at a constant temperature, the ratio of its concentrations in two layers is constant, irrespective of its total amount”. This is_________________?

A. The distribution law
B. Followed from Margules equation
C. A corollary of Henry’s law
D. None of these

Read More A solute distributes itself between two non-miscible solvents in contact with each other in such a way that, at a constant temperature, the ratio of its concentrations in two layers is constant, irrespective of its total amount”. This is_________________?
Thermodynamics for Chemical

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 ?

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 ?

A. Vapor compression cycle using expansion valve
B. Air refrigeration cycle
C. Vapor compression cycle using expansion engine
D. Carnot refrigeration cycle

Read More 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 ?
Thermodynamics for Chemical

Joule-Thomson co-efficient which is defined as, η = (∂T/∂P)H = 1/Cp (∂H/∂T)P, changes sign at a temperature known as inversion temperature. The value of Joule-Thomson co-efficient at inversion temperature is ___________________?

Joule-Thomson co-efficient which is defined as, η = (∂T/∂P)H = 1/Cp (∂H/∂T)P, changes sign at a temperature known as inversion temperature. The value of Joule-Thomson co-efficient at inversion temperature is ___________________?

A. 0
B. ∞
C. +ve
D. -ve

Read More Joule-Thomson co-efficient which is defined as, η = (∂T/∂P)H = 1/Cp (∂H/∂T)P, changes sign at a temperature known as inversion temperature. The value of Joule-Thomson co-efficient at inversion temperature is ___________________?

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