Thermodynamics and Kinetics Mid - I, September - 2014

1.A PMM I is _____
  • Impossible according to second law of thermodynamics
  • Possible according to first law of thermodynamics
  • Impossible according to first law of thermodynamics
  • Possible according to second law of thermodynamics
Answer: C
2.The temperature of a gas is the measure of _______________
  • Average kinetic energy of gas molecules
  • Average distance between gas molecules
  • Average potential energy of gas molecules
  • None
Answer: A
3.A path function quantity is ___________
  • Pressure
  • Temperature
  • Enthalpy
  • Heat
Answer: D
4.Second law of thermodynamics gives the concept of ________
  • Work
  • heat
  • internal energy
  • entropy
Answer: D
5.The sequence of processes that eventually return the working substance to its original state is known as _________________
  • Process
  • property
  • cycle
  • state
Answer: C
6.For a reversible process, the change in entropy is ___________________
  • zero
  • minimum
  • maximum
  • unity
Answer: A
7.For a irreversible process the change in entropy is _________________
  • Negative
  • positive
  • zero
  • none
Answer: B
8.Gibb’s function is expressed as ______
  • H-TS
  • U-TS
  • H+TS
  • U+TS
Answer: A
9.Heat supplied to a system equals the work done in case of a non-flow process carried out
  • Isochorically
  • Isobarically
  • Isothermally
  • Adiabatically
Answer: C
10.Only throttling calorimeter is used for measuring
  • Very low dryness fraction up to 0.7
  • Very high dryness fraction up to 0.98
  • dryness fraction of only low pressure steam
  • dryness fraction of only high pressure steam
Answer: B
11.The concept of temperature is given by ____________ law of thermodynamics
Answer: zeroth
12.During throttling process _____________ remains constant
Answer: Enthalpy
13.The value of extensive property is essentially dependant on ____________ of the system
Answer: Mass
14.As differentials, heat and work would be described mathematically as ________
Answer: Inexact
15.PMM II violates the _______________ statement.
Answer: Kelvin-Planck
16.In case of Power failure,a battery is used to light a bulb,run a fan and heat an electric iron (each of 100 W rating) for 10 minutes.In this operation the work done by the battery is ____ KJ.
Answer: 180
17.With increase in temperature the specific heats for gases(except monoatomic) _________ .
Answer: Increases
18.Solid, liquid and vapour phases co-exist at _____________ point
Answer: Triple
19.The internal energy of an ideal gas is a function of _________ only
Answer: Absolute temperature
20.For a closed system, the difference between heat added to and work done by the system is equal to _______________________
Answer: Internal energy