Our website is made possible by displaying online advertisements to our visitors. Please consider supporting us by whitelisting our website.

Thermodynamics for Chemical

In case of vapour compression refrigeration system, elevating the evaporator temperature (keeping the condenser temperature constant) results in_____________?

Thermodynamics for Chemical /
In case of vapour compression refrigeration system, elevating the evaporator temperature (keeg the condenser temperature constant) results in_____________?

A. Enhanced COP
B. Decreased COP
C. No change in the value of COP
D. Increased or decreased COP; depending upon the type of refrigerant

In case of vapour compression refrigeration system, elevating the evaporator temperature (keeping the condenser temperature constant) results in_____________? Read More »

Thermodynamics for Chemical

“At the absolute zero temperature, the entropy of every perfectly crystalline substance becomes zero”. This follows from the __________________?

Thermodynamics for Chemical /
“At the absolute zero temperature, the entropy of every perfectly crystalline substance becomes zero”. This follows from the __________________?

A. Third law of thermodynamics
B. Second law of thermodynamics
C. Nernst heat theorem
D. Maxwell’s relations

“At the absolute zero temperature, the entropy of every perfectly crystalline substance becomes zero”. This follows from the __________________? Read More »

Thermodynamics for Chemical

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) ?

Thermodynamics for Chemical /
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) ?

A. (∂P/∂V)S = (∂P/∂V)T
B. (∂P/∂V)S = [(∂P/∂V)T]Y
C. (∂P/∂V)S = y(∂P/∂V)T
D. (∂P/∂V)S = 1/y(∂P/∂V)T

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) ? Read More »

Thermodynamics for Chemical

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?

Thermodynamics for Chemical /
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?

A. Isobaric
B. Isothermal
C. Adiabatic
D. None of these

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? Read More »

Thermodynamics for Chemical

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) ?

Thermodynamics for Chemical /
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) ?

A. Δ S1 is always Δ SR
C. Δ S1 is always > Δ SR
D. Δ S1 is always = Δ SR

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) ? Read More »

Thermodynamics for Chemical