Access free live classes and tests on the app
Download
+
Unacademy
  • Goals
    • AFCAT
    • AP EAMCET
    • Bank Exam
    • BPSC
    • CA Foundation
    • CAPF
    • CAT
    • CBSE Class 11
    • CBSE Class 12
    • CDS
    • CLAT
    • CSIR UGC
    • GATE
    • IIT JAM
    • JEE
    • Karnataka CET
    • Karnataka PSC
    • Kerala PSC
    • MHT CET
    • MPPSC
    • NDA
    • NEET PG
    • NEET UG
    • NTA UGC
    • Railway Exam
    • SSC
    • TS EAMCET
    • UPSC
    • WBPSC
    • CFA
Login Join for Free
avtar
  • ProfileProfile
  • Settings Settings
  • Refer your friendsRefer your friends
  • Sign outSign out
  • Terms & conditions
  • •
  • Privacy policy
  • About
  • •
  • Careers
  • •
  • Blog

© 2023 Sorting Hat Technologies Pvt Ltd

Watch Free Classes
  • NEET 2024
  • NEET Answer Key 2024
  • NEET 2024 Preparation Toolkit
  • NEET Rank Predictor 2024
  • NEET College Predictor 2024
  • Study Materials
  • Notifications
  • NEET Syllabus 2024
  • NEET Question Paper
  • NEET Notes
  • NEET Books
  • NEET Paper Pattern
  • Video Lectures
  • Mind Maps
  • Downloads
  • Difference Between
  • Full Forms
  • Exam Tips
  • MCQs
NEET UG 2026 » NEET UG Study Material » Chemistry » Formation
neetug_toolkit

Formation

The standard enthalpy of production of a substance is the amount of energy required to produce one mole of the substance from its constituent elements in their standard states. The standard enthalpy of production of a pure element is zero.

Table of Content
  •  

A formation is how something is put together, how it is put together, or how it is put together. An example of a formation is when a group of soldiers march together. An example of a formation is a group of rocks that have been around for a long time. Something that has a structure or form. 

The standard enthalpy of formation of any element in its standard state is zero, so it must be zero to be called that. Because oxygen can be ozone (O3), atomic oxygen (O), and molecular oxygen (O2), O2 is the most stable at 1 atm and 25°C. In the same way, hydrogen is H2(g), not atomic hydrogen (H)

concept formation

How a person learns to put together different experiences into general rules or classes People do things like pick up a certain stone or drive a certain car. People, on the other hand, seem to think about classes. For example, one knows that stones (in general) sink, and that cars (as a group) have engines that make them move. In other words, these things are thought of in a general way, not just for a single stone or car. People who know about these types of groups can use that knowledge to act in new ways. If one person is a customer and the other is a worker, they tend to act the way they should. Many people, on the other hand, can drive almost any car by learning how to drive a certain car.

Disciplinary learning, on the other hand, is a type of classification behavior that is different from conceptual classification. Discrimination learning is when things are put into groups based on things that can be seen, like their physical size or shape. The focus on physical features in discrimination learning can be contrasted with the more abstract nature of concept formation, which is more like learning to read. When a stimulus is thought to be similar to a number of past experiences, however, the response may be a compromise because an object doesn’t have to be all or nothing in discrimination learning. For example, there is no absolute difference between tall and short people.

The standard enthalpy of formation 

Compounds have standard enthalpies of formation or standard heats of formation, which are the changes in enthalpy that happen when you make one mole of the compound from its constituent elements, with all of the substances in their standard states at the same time. The standard pressure value is 105 Pa, which is 100 kPa or 1 bar. Before 1982, the value 1.00 atm (101.325 kPa) was used. There is no set temperature. Its sign is fH. The superscript Plimsoll on this symbol means that the process took place under standard conditions and at the temperature (usually 25 °C or 298.15 K) that was chosen. The following are the standard states:

  • It would be in this state if the ideal gas equation was true and there was 1 bar of pressure.
  • In an ideal solution, if a gas or solid solute is present, the hypothetical state of concentration of the solute at a pressure of 1 bar extrapolated from infinite dilution: one mole per liter (1 M) at a pressure of 1 bar.
  • It’s the standard state for a pure substance or solvent that has been condensed into something that is either liquid or solid. This is the pure substance or solvent under a pressure of 1 bar.
  • For an element, the shape in which the element is most stable when it is under 1 bar of pressure is called the “most stable shape.” When it comes to phosphorus, one exception is that at 1 bar, the most stable form is black, but when it comes to enthalpy of formation, white phosphorus is used as the standard.

What are Pure Elements

Pure elements are those that don’t have any other elements mixed in with them. Only one substance is made up of a pure ingredient or compound that doesn’t have any other parts. Mixtures of components, combinations of chemicals, or mixtures of elements and compounds may not be pure materials, but they can still be useful.

Impure compounds usually have melting points that are a little lower than the melting point of the pure material and a wider range of melting temperatures. The melting point of pure substances can be found by comparing the melting point of the substance in the experiment to data on what the melting point should be.

All elements have one type of atom in them, but not all elements have one type of atom. Each type of atom has the same number of protons in it. To make more complex molecules called compounds, chemical bonds hold together the parts of the molecules. A compound is made up of covalent or ionic bonds that hold together two or more types of elements.

sum of enthalpy 

An enthalpy is the sum of the internal energy and the product of the pressure and volume of a thermodynamic system. This is called a thermodynamic system. Enthalpy is an energy-like property or state function. It has the same dimensions as energy and is measured in units of joules or ergs. Its value is determined only by the temperature, pressure, and composition of the system, not by its history or how it has changed over time. The enthalpy is made up of the sum of the internal energy and how much pressure and volume the system has:   H = E + PV.

Law of energy conservation says that the amount of energy that changes inside a system equals the amount of heat that is transferred to, less the amount of work that is done by that system. It doesn’t matter what kind of work is done if the only thing that changes is the volume at the same pressure. The enthalpy change is equal to the amount of heat that the system gets. People talk about what happens when you add energy to something and it changes from a liquid state to a gas state. This is called the enthalpy of vaporization and is measured in joules per mole. Phase transitions that involve changes in enthalpy, like the enthalpy (or latent heat) of fusion, aren’t the only ones that have this kind of change in enthalpy, though. As with other energy functions, it’s not easy or necessary to figure out the absolute values of enthalpy. For each substance, the zero-enthalpy state can be a good place to start.

Conclusion 

From the following article we can conclude that A formation is a way of putting things together. A formation is a group of soldiers marching together. A formation is a long-lived clump of rocks. Something with shape or structure.

Any element’s standard enthalpy of production must be zero to be dubbed such. O2 is the most stable form of oxygen at 1 atm and 25°C. Similarly, hydrogen is H2(g), not H2 (H)

faq

Frequently asked questions

Get answers to the most common queries related to the NEET UG Examination Preparation.

What do you think of when you hear the word formation?

Ans : giving shape or form to something or taking shape 2: something that makes new words. 3: structure: the way a t...Read full

What is the example of formation?

Ans:  formation is how something is put together, how it is put together, or how it is put together. An example of ...Read full

How can you tell if something is pure?

Ans: This word is used in chemistry to refer to a substance that has only one type of atom. This is called a pure el...Read full

When you make something, how do you find the standard enthalpy?

Ans: Formula: The standard enthalpy change of formation is equal to what’s left over after subtracting what...Read full

What is the standard enthalpy of formation with example?

Ans: The standard enthalpy of formation of any element in its standard state is zero, so it must be zero to be calle...Read full

Ans : giving shape or form to something or taking shape 2: something that makes new words. 3: structure: the way a thing is made, like the shape of the heart.

Ans:  formation is how something is put together, how it is put together, or how it is put together. An example of a formation is when a group of soldiers march together. An example of a formation is a group of rocks that have been around for a long time. Something that has a structure or form.

Ans: This word is used in chemistry to refer to a substance that has only one type of atom. This is called a pure element. Nuclear scientists, on the other hand, say that a pure element is one that has only one stable isotope.

Ans: Formula: The standard enthalpy change of formation is equal to what’s left over after subtracting what’s left over from what’s left over from what’s right over.

Ans: The standard enthalpy of formation of any element in its standard state is zero, so it must be zero to be called that. Because oxygen can be ozone (O3), atomic oxygen (O), and molecular oxygen (O2), O2 is the most stable at 1 atm and 25°C. In the same way, hydrogen is H2(g), not atomic hydrogen (H).

 

Crack NEET UG with Unacademy

Get subscription and access unlimited live and recorded courses from India’s best educators

  • Structured syllabus
  • Daily live classes
  • Ask doubts
  • Tests & practice
Learn more

Notifications

Get all the important information related to the NEET UG Examination including the process of application, important calendar dates, eligibility criteria, exam centers etc.

Best Books for NEET UG 2026 – Physics, Chemistry & Biology
How to Prepare for NEET UG 2026 at Home Without Coaching?
Last 10 Years NEET UG Question Papers – Download NEET UG Previous Year Question Paper with Solutions PDFs
NEET UG 2025 Counselling – Schedule, Dates, Fees, Seat Allotment
NEET UG 2026 Registration Date Extension
NEET UG 2026 Registration Process
NEET UG Answer Key 2025 – Download PDF
NEET UG Eligibility Criteria 2026 – Age Limit, Qualifying Codes, Number of Attempt
NEET UG Exam Analysis
NEET UG Exam Calendar
NEET UG Exam Information
NEET UG Exam Pattern 2026 – Check Marking Scheme, Subject-wise Question Distribution – NEET UG Total Marks
NEET UG Hall Ticket 2026 – Check Steps to Download
NEET UG Marking Scheme
NEET UG Previous Papers Analysis
NEET UG Registration Fees
NEET UG Result 2026 (OUT): Download Link @neet.nta.nic.in, NEET Score card
NEET UG Syllabus 2026
NEET UG Syllabus 2026 with Chapter-wise Weightage
See all

Related articles

Learn more topics related to Chemistry
ZWITTERION

In this chapter we will discuss zwitterion,characteristics of zwitterion, isoelectric point, pH value, and application.At last we will discuss some important questions related to zwitterion.

ZONE REFINING OF METALS

What is zone refining and what is its significance in manufacturing transistors? Click here to get more info on the aforementioned topic.

Ziegler Natta Catalyst

In this chapter we will discuss Ziegler natta catalyst, discovery, preparation, mechanism and applications. At last we will discuss this ziegler natta catalyst.

Zeroth Law of Thermodynamics

In this lecture we’re going to learn about the Zeroth Law of Thermodynamics, zeroth law of thermodynamics, state zeroth law of thermodynamics and significance of zeroth law of thermodynamics.

See all
Access more than

9,257+ courses for NEET UG

Get subscription

Trending Topics

  • NEET Preparation Tips
  • NEET 2024 Preparation Tips
  • How to Prepare for NEET from Class 11?
  • How to Prepare for NEET?
  • NEET 2024
  • NEET Syllabus 2024
  • NEET Question Paper
  • NEET Exam Pattern
  • NEET Notification
  • NEET Exam Calendar
  • NEET Results
  • NEET Eligibility
  • NEET Preparation Books
Download NEET Formulas

NEET Previous Year Question Papers

  • NEET 2022 Question Paper
  • NEET 2021 Question Paper
  • NEET 2020 Question Paper
  • NEET 2019 Question Paper
  • NEET 2018 Question Paper
combat_neetug

Related links

  • NEET Study Materials
  • How Many Attempts for NEET
  • How Many Marks Are Required in NEET for MBBS
  • Living World NEET Questions
  • MBBS Full Form
  • NEET Full Form
  • Physics NEET Syllabus
freeliveclasses_neetug
Download NEET 2023 question paper
Company Logo

Unacademy is India’s largest online learning platform. Download our apps to start learning


Starting your preparation?

Call us and we will answer all your questions about learning on Unacademy

Call +91 8585858585

Company
About usShikshodayaCareers
we're hiring
BlogsPrivacy PolicyTerms and Conditions
Help & support
User GuidelinesSite MapRefund PolicyTakedown PolicyGrievance Redressal
Products
Learner appLearner appEducator appEducator appParent appParent app
Popular goals
IIT JEEUPSCSSCCSIR UGC NETNEET UG
Trending exams
GATECATCANTA UGC NETBank Exams
Study material
UPSC Study MaterialNEET UG Study MaterialCA Foundation Study MaterialJEE Study MaterialSSC Study Material

© 2025 Sorting Hat Technologies Pvt Ltd

Unacademy
  • Goals
    • AFCAT
    • AP EAMCET
    • Bank Exam
    • BPSC
    • CA Foundation
    • CAPF
    • CAT
    • CBSE Class 11
    • CBSE Class 12
    • CDS
    • CLAT
    • CSIR UGC
    • GATE
    • IIT JAM
    • JEE
    • Karnataka CET
    • Karnataka PSC
    • Kerala PSC
    • MHT CET
    • MPPSC
    • NDA
    • NEET PG
    • NEET UG
    • NTA UGC
    • Railway Exam
    • SSC
    • TS EAMCET
    • UPSC
    • WBPSC
    • CFA

Share via

COPY