Quiz in Thermodynamics (Elements - Part 2)

At critical point the latent enthalpy of vaporization is

• temperature dependent
• maximum
• minimum
• zero

What is the force which tends to draw a body toward the center about which it is rotating?

• Centrifugal advance
• Centrifugal force
• Centrifugal in motion
• Centripetal force

When a system deviates infinitesimally from equilibrium at every instant of its state, it is undergoing

• quasi-static process
• cyclic process
• isometric process
• isobaric process

A pressure of 1 millibar is equivalent to

• 1000 psi
• 1000 dynes/cm²
• 1000 cm of Hg
• 1000 kg/cm²

Work done per unit change when charged is moved from one point to another.

• Potential at a point
• Electrostatic point
• Potential difference
• Equipotential surface

How many independent properties are required to completely fix the equilibrium state of a pure gaseous compound?

• 4
• 1
• 2
• 3

Which of the following relations defines enthalpy?

• h = pV + T
• h = u + p/V
• h = u + p/t
• h = u + pV

Which of the following is true for water at a reference temperature where enthalpy is zero?

• Internal energy is negative
• Vapor pressure is zero
• Entropy is non-zero
• Specific volume is zero

On what plane is the Mollier diagram plotted?

• h-s
• p-V
• h-u
• p-T

The compressibility factor z is used for predicting the behavior of non-ideal gases. How is the compressibility factor defined relative to an ideal gas? (subscript c refers to critical value)

• z = P/Pc
• z = PV/RT
• z = (T/Tc)(Pc/P)
• z = T/Tc