Thermodynamic processes are indicated in the following diagram :
Column 1 Column 2 P. Process I a. Adiabatic Q. Process II b. Isobaric R. Process III c. Isochoric S. Process IV d. Isothermal
Thermodynamic processes are indicated in the following diagram :
| Column 1 | Column 2 | ||
|---|---|---|---|
| P. | Process I | a. | Adiabatic |
| Q. | Process II | b. | Isobaric |
| R. | Process III | c. | Isochoric |
| S. | Process IV | d. | Isothermal |
- P $\to $c, Q $\to $ a, R $\to $ d ,S $\to $ b
- P $\to $c, Q $\to $ d, R $\to $ b ,S $\to $ a
- P $\to $d, Q $\to $ b, R $\to $ a ,S $\to $ c
- P $\to $a, Q $\to $ c, R $\to $ d ,S $\to $ b
The Correct Option is A
Solution and Explanation
Isochoric: It is a thermodynamic process that occurs at a constant volume. During this process the work done on or by the system is zero. Therefore it is path I
Adiabatic: It is a thermodynamic process in which there is no exchange of heat between the system and its surrounding. Therefore it is path II Isothermal: It is a thermodynamic process that occurs at a constant temperature. Therefore it is path III Isobaric: It is a thermodynamic process that occurs at a constant pressure. Therefore it is path IV.
Top Questions on Thermodynamics
The ratio of the fundamental vibrational frequencies \( \left( \nu_{^{13}C^{16}O} / \nu_{^{12}C^{16}O} \right) \) of two diatomic molecules \( ^{13}C^{16}O \) and \( ^{12}C^{16}O \), considering their force constants to be the same, is ___________ (rounded off to two decimal places).}
- GATE CY - 2025
- Chemistry
- Thermodynamics
- The translational, vibrational, and rotational molecular partition functions for a system containing ideal diatomic gas molecules in the canonical ensemble (N, V, T) are written as \( q_{{trans}}, q_{{vib}}, \) and \( q_{{rot}} \), respectively. The option that correctly defines their thermodynamic variable(s) dependency is:
- GATE CY - 2025
- Chemistry
- Thermodynamics
A heat pump, operating in reversed Carnot cycle, maintains a steady air temperature of 300 K inside an auditorium. The heat pump receives heat from the ambient air. The ambient air temperature is 280 K. Heat loss from the auditorium is 15 kW. The power consumption of the heat pump is _________ kW (rounded off to 2 decimal places).
- The enthalpy change for the reaction \( \text{C}_2\text{H}_4 (\text{g}) + 3\text{O}_2 (\text{g}) \rightarrow 2\text{CO}_2 (\text{g}) + 2\text{H}_2\text{O} (\text{l}) \) is \( -1410 \, \text{kJ/mol} \). If the standard enthalpies of formation of \( \text{CO}_2 (\text{g}) \) and \( \text{H}_2\text{O} (\text{l}) \) are \( -393.5 \, \text{kJ/mol} \) and \( -286 \, \text{kJ/mol} \) respectively, what is the standard enthalpy of formation of \( \text{C}_2\text{H}_4 (\text{g}) \)?
- MHT CET - 2025
- Chemistry
- Thermodynamics
- The enthalpy of formation of hydrogen chloride (HCl) is \( -92.3 \, \text{kJ/mol} \). If 2 moles of HCl are formed from hydrogen and chlorine gas, calculate the total heat released.
- MHT CET - 2025
- Chemistry
- Thermodynamics
Questions Asked in NEET exam
- A bob is whirled in a horizontal plane by means of a string with an initial speed of ω rpm. The tension in the string is T. If speed becomes 2ω while keeping the same radius, the tension in the string becomes:
Identify the major product C formed in the following reaction sequence:
- NEET (UG) - 2024
- Chemical Reactions
- In an electrical circuit, the voltage is measured as V = (200 ± 4) volt and the current is measured as I = (20 ± 0.2) A. The value of the resistance is:
- NEET (UG) - 2024
- Current electricity
- What is the fate of a piece of DNA carrying only gene of interest which is transfered in to an alien organism?
A. The piece of DNA would be able to multiply itself independently in the progeny cells of the organism.
B. It may get integrated into the genome of the recipient.
C. It may multiple and be inherited along with the host DNA.
D. The alien piece of DNA is not an integral part of chromasame.
E. It shows ability to replicate.
Choose the correct answer from the options given below: - The magnetic moment of an iron bar is M. It is now bent in such a way that it forms an arc section of a circle subtending an angle of 60° at the centre. The magnetic moment of this arc section is
- NEET (UG) - 2024
- Magnetic moment
Concepts Used:
Thermodynamics
Thermodynamics in physics is a branch that deals with heat, work and temperature, and their relation to energy, radiation and physical properties of matter.
Important Terms
System
A thermodynamic system is a specific portion of matter with a definite boundary on which our attention is focused. The system boundary may be real or imaginary, fixed or deformable.
There are three types of systems:
- Isolated System – An isolated system cannot exchange both energy and mass with its surroundings. The universe is considered an isolated system.
- Closed System – Across the boundary of the closed system, the transfer of energy takes place but the transfer of mass doesn’t take place. Refrigerators and compression of gas in the piston-cylinder assembly are examples of closed systems.
- Open System – In an open system, the mass and energy both may be transferred between the system and surroundings. A steam turbine is an example of an open system.
Thermodynamic Process
A system undergoes a thermodynamic process when there is some energetic change within the system that is associated with changes in pressure, volume and internal energy.
There are four types of thermodynamic process that have their unique properties, and they are:
- Adiabatic Process – A process in which no heat transfer takes place.
- Isochoric Process – A thermodynamic process taking place at constant volume is known as the isochoric process.
- Isobaric Process – A process in which no change in pressure occurs.
- Isothermal Process – A process in which no change in temperature occurs.
Laws of Thermodynamics
Zeroth Law of Thermodynamics
The Zeroth law of thermodynamics states that if two bodies are individually in equilibrium with a separate third body, then the first two bodies are also in thermal equilibrium with each other.
First Law of Thermodynamics
The First law of thermodynamics is a version of the law of conservation of energy, adapted for thermodynamic processes, distinguishing three kinds of transfer of energy, as heat, as thermodynamic work, and as energy associated with matter transfer, and relating them to a function of a body's state, called internal energy.
Second Law of Thermodynamics
The Second law of thermodynamics is a physical law of thermodynamics about heat and loss in its conversion.
Third Law of Thermodynamics
Third law of thermodynamics states, regarding the properties of closed systems in thermodynamic equilibrium: The entropy of a system approaches a constant value when its temperature approaches absolute zero.