For an isentropic process the exponent n in the relation PVn = constant has the value of where ? = ratio of specific heats
A.0
B.1
C.?
D.?
Category: Chemical Thermodynamics Mcqs
Air is
A.a gas
B.a mixture of gases
C.a mixture of gases and vapour
D.a mixture of vapours
An open system implies
A.the use of a control volume
B.no interchange between system and surroundings
C.the presence of free surface
D.that a definite mass of material is considered
Select the correct statement
A.Reactions with high activation energies are very temperature sensitive
B.Reactions with high activation energies are relatively temperature insensitive
C.Reactions with low activation energies are very temperature sensitive
D.A given reaction is much more temperature insensitive at low temperature than at high temperature.
First law of thermodynamics is based on the
A.law of conservation of mass
B.law of conservation of energy
C.law of equipartion of energy
D.law of conservation of momentum
The compressibility factor (Z) of an ideal gas is always
A.0
B.1
C.>1
D.<1
For an ideal gas Cp = 0.445 kcal/(kg.K) and ? = 1.33 the gas constant in kcal/(kg.K) is
A.0.147
B.0.592
C.0.885
D.0.11
According to the law of Petit and Dulong the atmoic heat capacities of the crystalline solid elements are nearly constant and equal to
A.3.2 cal/g atom
B.6.2 cal/g atom
C.5.2 cal/g atom
D.1.4 cal/g atom
You turn off the water flowing into the tube and open the drain. This is an example of
A.an open steady-state system
B.an open unsteady-state system
C.a closed system
D.none of the above
For all gases other than monoatomic gases the molal heat capacity at constant-volume is
A.greater than 3 kcal/(kmol.K)
B.less than 3 kcal/(kmol.K)
C.equal to 3 kcal/(kmol.K)
D.less than or equal to 3 kcal/(kmol.K) depending on the gas
