Thermodynamic Processes and Indicator Diagrams

IMPORTANT

Thermodynamic Processes and Indicator Diagrams: Overview

This topic covers concepts such as Indicator Diagrams, Cyclic Process, Adiabatic Process, Isothermal Process, Isobaric Process, and Isochoric Process.

Important Questions on Thermodynamic Processes and Indicator Diagrams

EASY
IMPORTANT

Which one of the following graphs is/are correct for isochoric process?

EASY
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For an adiabatic process of an ideal gas, P×Vγ=constant,γ=

HARD
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One mole of an ideal monatomic gas undergoes a linear process from A to B, in which is pressure P and its volume V change as shown in the figure. The absolute temperature T versus volume V for the given process is
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MEDIUM
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A cycle followed by an engine (made of one mole of an ideal gas in a cylinder with a piston) is shown in figure. The heat exchanged by the engine with the surroundings at constant volume is: ( CV=32RPA and PB are the pressures of the gas at point A and point B respectively, and VA is the volume of the gas at point A)
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EASY
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Consider a cycle followed by an engine as shown in figure
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1 to 2 is isothermal
2 to 3 is adiabatic
3 to 1 is adiabatic
such a process does not exist because

MEDIUM
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Two solid bodies of equal masses are heated at the same rate under identical condition. The change is temperature is shown graphically as a function of time. The ratio of specific heat in solid form should be SASB
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MEDIUM
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Assertion: Work done in a cyclc process as shown in figure  W=πP2-P1V2-V1 .


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Reason: Magnitude of work done for cyclic process is equal to the area enclosed by the P-V diagram.

MEDIUM
IMPORTANT

One mole of a mono-atomic gas behaving as per PV=nRT at 27°C is subjected to reversible isoentropic compression untill final temperature reaches 327°C. If the initial pressure was 1.0 atm then the value of lnP (final) is -

(given ln 2=0.7)

EASY
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In a closed insulated container, a liquid is stirred with a paddle to increase its temperature. In this process, which of the following is true

EASY
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P-T diagram is shown below then choose the corresponding V-T diagram.


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EASY
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P-T diagram is shown below then choose the corresponding V-T diagram.

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MEDIUM
IMPORTANT

The three diagrams below depict three different processes for a given mass of an ideal gas. What information can be drawn regarding the change of (a) pressure, (b) volume and (c) temperature of the gas from the plots as shown in figure (a), (b) and (c), respectively.


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EASY
IMPORTANT

A cyclic process ABCD is shown in the following P-V diagram. Which of the following curves represents the same process?

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HARD
IMPORTANT

Two moles of an ideal monatomic gas undergoes a cyclic process as shown in diagram. The temperatures in different states are given 6T1=3T2=2T4=T3=1800 K. Determine the work done by the gas during the cycle:


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HARD
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A cyclic process ABCDA is shown below in the given p-V diagram. In the following answers the one that represents the same process as in p-V diagram
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EASY
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One mole of diatomic ideal gas undergoes a cyclic process, ABC as shown in diagram. The process, BC is adiabatic. The temperatures at A, B and C are 400 K, 800 K and 600 K, respectively. Choose the correct statement.

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HARD
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p-V curve for the process whose V-T curve is

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EASY
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The internal energy change when a system goes from state A to B is 40 KJ/mole. If the system goes A to B by a reversible path and returns to state A by an irreversible path what would be the net change in internal energy?

HARD
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For the adiabatic expansion of an ideal gas :

HARD
IMPORTANT

One mole of an ideal gas is carried through the reversible cyclic process as shown in figure. The max. temperature attained by the gas during the cycle :-+



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