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Author: misamaliraza94

  • Phy. and Che.Properties of Solids

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    Solids are incompressible, meaning the constituent particle is arranged close to each other and because of that, there is negligible space between the constituent particle. Solids are rigid. This is due to lack of space between the constituent particles which make it rigid or fixed. Solids have definite mass, volume and shape due to which…

  • Solid State

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    misamaliraza94
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    Solid-state is nothing but one of the states of matter. In our early days of schooling, we have learnt that matter exists in three states – solid, liquid and gas. However, as we progress from lower to higher classes the concepts get more advanced and there are more things to learn. In this lesson, we…

  • FAQs

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    misamaliraza94
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    What is the importance of the topic Thermodynamics? Thermodynamics is the subject which helps in the relation of work, heat, temperature and energy. Studying this topic properly will help students gain overall knowledge. How many laws of Thermodynamics are there in total? There are four laws of thermodynamics.

  • Few Important Questions

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    misamaliraza94
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    Given: Aluminium quantity 60.0 g, a temperature increases from 35°C to 55°C, molar heat capacity 24 J mol–1 K–1 Calculate the number of kJ of heat. Given: Equilibrium constant of a reaction is 10, T = 300 K, R = 8.314 JK–1mol–1 Calculate the value of ∆G0? ∆U = 0 for an isolated system, calculate ∆S

  • Hess`s law

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    misamaliraza94
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    Hess’s law states that the standard reaction enthalpy for overall reaction taking place in several steps will be equal to the sum of standard enthalpies of intermediate reaction steps by assuming that each step occurs at the same temperature.

  • Enthalpy Change

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    Enthalpy change is defined as the change in energy of a system at constant pressure. It is denoted as ΔH. Enthalpy is a state function. Enthalpy change, ∆H = ∆U + ∆ngRT, can be calculated directly from the change in heat at constant pressure, ∆H = qp

  • Introduction

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    misamaliraza94
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    Thermodynamics deals with the change of energy in physical and chemical processes. It allows us to study these changes quantitatively as well as to make effective predictions. Therefore, we divide the universe as surrounding and system. Physical or chemical processes lead to progression or immersion of heat part of it may be converted to work.…

  • FAQs

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    misamaliraza94
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    hat does the Valence bond theory state? In valence bond theory, the atomic orbitals of individual atoms are combined to form chemical bonds. What is the meaning of lone pair of electrons? In chemistry, a lone pair refers to a pair of valence electrons that are not shared with another atom in a covalent bond…

  • Few Important Questions

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    misamaliraza94
    in

    How is a chemical bond formed? Explain in detail. What is Octet rule? Write its limitations and importance. Write the difference between a pi bond and a sigma bond. Explain polar covalent bond with an example.

  • Lone Pairs Of Electrons

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    misamaliraza94
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    A few atoms which are bonded have an extra pair of electrons which are not involved in bonding. Such electrons are called lone pairs of electrons. Lewis dot structure represents the arrangement of lone pairs and bonded pairs around each atom of a molecule.