NEET Exam > NEET Notes > Chemistry Class 11 > Mnemonics: Thermodynamics
Mnemonics: Thermodynamics | Chemistry Class 11 - NEET PDF Download
| Table of contents |
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| Types of Systems |
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| First Law of Thermodynamics |
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| State Functions |
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| Types of Processes |
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| Spontaneous Processes |
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| Second Law of Thermodynamics |
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| Third Law of Thermodynamics |
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Types of Systems
Types: Open, Closed, Isolated
Mnemonic:"Open, Closed, Isolated—Systems Defined, Energy Controlled!"
Explanation:
Open = Open system allows both energy and matter to be exchanged with the surroundings.
Closed = Closed system allows only energy to be exchanged, not matter.
Isolated = Isolated system does not exchange either energy or matter with the surroundings.
First Law of Thermodynamics
Mnemonic: "Energy’s Conserved, Heat and Work, Together Preserved!"
Explanation:
Energy’s Conserved = The first law states that energy cannot be created or destroyed, only transferred or converted.
Heat and Work = Energy is transferred as heat or work between the system and surroundings.
Together Preserved = The change in internal energy (ΔU) equals the heat added to the system (Q) minus the work done by the system (W): ΔU = Q - W.
Question for Mnemonics: ThermodynamicsTry yourself: What type of system allows both energy and matter to be exchanged?View Solution
State Functions
Types: Pressure, Volume, Temperature, Enthalpy
Mnemonic: "Pipes Vent To Engines"
Breakdown:
- Pipes - Pressure
- Vent - Volume
- To - Temperature
- Engines - Enthalpy
Types of Processes
Types: Isothermal, Adiabatic, Isobaric, Isochoric
Mnemonic: "Isha Adds Ice Cubes"
Breakdown:
- Isha - Isothermal
- Adds - Adiabatic
- Ice - Isobaric
- Cubes - Isochoric
Spontaneous Processes
Mnemonic: "Spontaneity’s Flow, Energy Goes Low!"
Explanation:
Spontaneity’s Flow = A spontaneous process occurs naturally without external influence.
Energy Goes Low = For a process to be spontaneous, the system must move towards a state of lower energy.
Question for Mnemonics: ThermodynamicsTry yourself: What does 'Pipes Vent To Engines' help remember?View Solution
Second Law of Thermodynamics
Mnemonic:"Entropy’s Rise, Disorder’s the Prize!"
Explanation:
Entropy’s Rise = The second law states that the entropy (disorder) of the universe always increases.
Disorder’s the Prize = In any spontaneous process, the total entropy of the system and surroundings increases.
Third Law of Thermodynamics
Mnemonic:"Zero Entropy at Absolute Zero—Energy’s Free to Go!"
Explanation:
Zero Entropy at Absolute Zero = The third law states that the entropy of a perfect crystal at absolute zero (0 K) is zero.
Energy’s Free to Go = At absolute zero, the system has no disorder and no energy to be transferred.
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FAQs on Mnemonics: Thermodynamics - Chemistry Class 11 - NEET
| 1. What are the basic laws of thermodynamics that I need to remember for NEET? |  |
Ans. The three main laws of thermodynamics that you should remember for NEET are:
1. <b>Zeroth Law</b>: If two systems are in thermal equilibrium with a third system, they are in thermal equilibrium with each other.
2. <b>First Law</b>: Energy cannot be created or destroyed, only transformed from one form to another (ΔU = Q - W).
3. <b>Second Law</b>: The total entropy of an isolated system can never decrease over time, and natural processes tend to move towards a state of maximum disorder or entropy.
| 2. How can I effectively use mnemonics to remember thermodynamic concepts for NEET? | |
Ans. You can create mnemonics by associating complex terms with simple phrases or acronyms. For example, for the laws of thermodynamics, you might use "Zebra Fights Tigers" to remember Zeroth, First, and Second Laws. Additionally, breaking down the definitions into smaller parts and creating visual images related to those parts can enhance your memory retention.
| 3. What are some common thermodynamic processes I should study for NEET? | |
Ans. The common thermodynamic processes that you should focus on include:
1. <b>Isothermal Process</b>: Constant temperature process.
2. <b>Adiabatic Process</b>: No heat exchange with the environment.
3. <b>Isobaric Process</b>: Constant pressure process.
4. <b>Isochoric Process</b>: Constant volume process.
Understanding the characteristics of these processes and their equations is crucial for NEET.
| 4. Why is understanding entropy important in thermodynamics for NEET? | |
Ans. Entropy is a measure of the disorder or randomness in a system. It is crucial in thermodynamics because it helps predict the direction of spontaneous processes and the feasibility of reactions. A fundamental understanding of entropy allows you to grasp the Second Law of Thermodynamics and its implications in real-world applications, which is often tested in NEET.
| 5. What are the applications of thermodynamics in real life that I should be aware of for NEET? | |
Ans. Thermodynamics has several real-life applications that are relevant for NEET, including:
1. <b>Heat Engines</b>: Understanding how engines convert heat into work.
2. <b>Refrigeration</b>: Principles of heat transfer used in refrigerators and air conditioners.
3. <b>Biological Systems</b>: Metabolic processes in organisms where energy transformations occur.
Familiarizing yourself with these applications can help contextualize thermodynamic principles and improve your understanding for the exam.
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