Higher Study | Thermodynamics | Thermodynamics System and Processes

Which of the following is an intensive property?

ক

Volume

খ

Colour

গ

Enthalpy

ঘ

Internal energy

Which of the following is not an intensive property?

ক

Temperature

খ

Density

গ

Mass

ঘ

Mole fraction

Which of the following items is not a path function?

ক

Heat

খ

Work

গ

Kinetic energy

ঘ

Thermal conductivity

Which of the following is not the intensive property?

ক

Pressure

খ

Temperature

গ

Density

ঘ

Heat

The constant volume gas thermometer works on the principle that

ক

at low pressure, the temperature of the gas is independent of its pressure at constant volume

খ

at high pressure, the temperature of the gas is independent of its pressure at constant volume

গ

at low pressure, the temperature of the gas is proportional of its pressure at constant volume

ঘ

at high pressure, the temperature of the gas is proportional of its pressure at constant volume

A reversible thermodynamic cycle containing only three processes and producing work is to be constructed. The constraints are: (a) there must be one isothermal process, (b) there must be one isentropic process, (c) the maximum and minimum cycle pressures and the clearance volumes are fixed, and (d) polytropic processes are not allowed. Then the numbers of possible cycles are

ক

1

খ

2

গ

3

ঘ

4

Why do particles in liquid water at 0°C have more energy as compared to particles in ice at the same temperature?

ক

the particles in water absorb heat energy during the process of conversion from ice to water vapour

খ

Because the particles in ice absorb heat energy during the process of conversion from ice to liquid water

গ

the particles in water radiate heat energy during the process of conversion from ice to liquid water

ঘ

the particles in water absorb heat energy during the process of conversion from ice to liquid water

When is a perfect vacuum obtained?

ক

When gauge pressure is zero

খ

When atmospheric pressure is zero

গ

When molecular momentum is unity and atmospheric pressure is zero

ঘ

When both absolute pressure and molecular momentum are zero

Which of the following statements are correct when related to a thermodynamic system? Internal energy is a property Internal energy is path independent Internal energy is path-dependent Internal energy is the area under the PV curve

ক

1 & 4

খ

1 & 2

গ

1 & 3

ঘ

2 & 4

Match items from groups I, II, III, IV and V. Group I Group II Group III Group IV Group V When added to the system is Differential Function Phenomenon E - Heat G - Positive I - Exact K - Path M - Transient F - Work H - Negative J - Inexact L - Point N - Boundary

ক

F – G - J - K – M E – G - I – K - N

খ

E – G - I - K – M F – H - I – K - N

গ

F – H - J - L – N E – H - I – L - M

ঘ

E – G - J - K – N F – H - J – K – N

Consider equation t = ap + b if the pressure at ice point and the steam point is 2 bar and 4 bar respectively then calculate t at p = 3.5 bar, where t is temperature p is pressure and a, b are constants.

ক

100°C

খ

75°C

গ

20°C

ঘ

0°C

The state of a simple compressible system is completely specified by how many independent, intensive properties?

ক

Two

খ

Four

গ

Three

ঘ

One

Figure shows the P-V diagram for a fixed mass of an ideal gas undergoing cyclic process ABCA. AB represents isothermal process. Which of the graph shown in figure represents the P-T Diagram of the cyclic process ?

ক

খ

গ

ঘ

A PV diagram is shown in the figure with three isotherms at temperature T1, T2 and T3. Four processes are represented in the diagram and are identified as 1, 2, 3 & 4. Then the processes indicated in the diagram are

ক

1 – Isothermal, 2 – Isobaric, 3 – Isochoric & 4 - Adiabatic

খ

1 – Isochoric, 2 – Isothermal, 3 – Adiabatic & 4 - Isobaric

গ

1 – Isobaric, 2 – Isothermal, 3 – Adiabatic & 4 - Isochoric

ঘ

1 – Isobaric, 2 – Adiabatic, 3 – Isothermal & 4 - Isochoric

What is the work done for a constant volume process?

ক

1

খ

0

গ

-1

ঘ

0.5