CBSE Class 12 Chemistry Notes – Chapter 1 DEFECTS IN CRYSTALS

An ideal crystal is a crystal which has the same unit cell containing the same lattice points throughout the whole of the crystal. At absolute zero, most of the ionic crystals show no defects. With the increase of temperature, chances of one or more of the lattice sites remaining unoccupied by the ions increase. This constitutes a defect. The number (n) of such defects per cm3 is given by the equation-

n = N x e-w/2RT

Where, N= total number of sites per cm3, w= work or energy required to produce a defect, T= absolute temperature, R = gas constant and e is base of natural logarithm.

What is absolute zero temperature?

Absolute zero is the lowest possible temperature where nothing could be colder and no heat energy remains in the substance. By international agreement, absolute zero is defined as precisely, 0 Kelvin on Kelvin scale and -273.15 degrees Celsius on the Celsius scale.

Learn with animated videos and make a boring topic interesting, for demos click CBSE Class 12 Chemistry.

Learn complete CBSE Class 12 Chemistry Notes – Chapter 1 DEFECTS IN CRYSTALS here..

For more such notes, sample papers, CBSE board exam pattern, study material, sample papers, Chemistry notes for Class 12, register with Takshila Learning.

For more details Call us : 8800999280/8800999284

Comments

Lessons-Worksheets-Question Papers-CBSE Class 2 English

Lessons-Worksheets-Question Papers-CBSE Class 2 English CBSE 2nd Class English – One and Many In this blog, we share the spelling rules used in the concept of One and Many. When there is only one of a naming word (noun), it is said to be a singular noun . When a noun shows more than one, it is said to be in the plural . We can add –S, -es, -ves or ies to show that there is more than one noun. For example, we say many birds, four biscuits, six brushes. But for the students of Class 2 , it’s very difficult and confusing to understand where to use s , es, ves or ies in the form of many. Don’t worry, it looks difficult, but it is very easy as in grammar each concept has a set of rules that need to practice. Noun ending with –s, -x, -o, -sh, -ch, and –ss form plurals by taking –es. Look at these pairs of words: Bus – Buses Brush – Brushes Continue ..... Click here ...

Class 3 English Practice Grammar Worksheet -The Adverb

Class 3 English Practice Grammar Worksheet -The Adverb Class 3 English – The Adverb – Kinds of Adverb Fill in the blanks with suitable Adverbs of place. Choose from the box. Up outside everywhere back down away here there ...

Bhakti Movement NCERT Class 12 History

Bhakti Movement NCERT Class 12 History The Bhakti movement was an effort to achieve salvation and emancipation by devotion to God. In Hindi, the word bhakti refers to fervent devotion to God. This movement, which stressed a single-minded, ardent devotion to God, is seen as the most characteristic act of religious progress during the Middle Ages. In the 12th and 13th centuries, Kabir Das was a key figure in the Bhakti Movement. As a result of the movement, Kabir Das' poems and religious writings attained widespread fame. Kabir Das was raised up by a Muslim family. However, his religious beliefs were influenced by his Hindu teacher Ramananda, who regarded Rama as the highest God. The first Sikh guru and the founder of Sikhism was Guru Nanak. He vehemently opposed prejudice based on customs, rivalry, and caste in religion. Nanak was raised in a Hindu household and from an early age began to exhibit spiritual tendencies. He helped the indigent and underprivileged. His followers began r...

Takshila Learning - Online Tutorials

Search This Blog