The triple point of water occurs at 0.00602 atm and
A.0.01 ?C
B.444.6?C
C.100?C
D.4?C
Category: Chemical Thermodynamics Mcqs
The translational kinetic energy of molecules of an ideal gas is
A.directly proportional to its absolute temperature
B.directly proportional to square root of its absolute temperature
C.directly proportional to square of its absolute temperature
D.independent of its temperature
Which of the following statements violates the postulates of the kinetic theory of gases?
A.Gases consist of a large number of tiny particles
B.All the molecules are in a state of rapid motion
C.The molecules in a gas remain at rest
D.The pressure exerted by the gas results from the impact of the molecules on the walls of the containing vessel
The enthalpy (H) of any system is defined by the mathematical expression
A.H = U-PV
B.H = U + PV
C.H = V + PU
D.H = U + RT
The temperature above which a substance can exists only in its gaseous state and cannot be liquefied regardless of the magnitude of pressure exerted on it is called
A.boiling point
B.saturation temperature
C.critical temperature
D.inversion temperature
At the critical temperature and pressure the specific heat of a gas at constant-pressure (Cp)
A.reaches a value of zero
B.reaches a value of infinity
C.is equal to 0.24 keal/(kmol.K)
D.is equal to 1 keal/(kmol.K)
Pascal is the unit of pressure and one pascal is equal to
A.1 N/m2
B.105 N/m2
C.133.32 N/m2
D.104 N/m2
The atomic heat capacities of all solid elements
A.decreases greatly with decrease in temperature
B.increases greatly with decrease in temperature
C.remains unaffected with change in temperature
D.approaches a value of infinity at absolute zero temperature
The heat capacities for the ideal-gas state are
A.functions of temperature only
B.functions of pressure only
C.functions of temperature as well as pressure
D.independent of temperature as well as pressure
