problems involving heat flow and temperature changes

The heat capacity C of an object, is the proportionality constant between the heat Q that the object absorbs or loses and the resulting temperature change D T of the objec..

The heat capacity C of an object, is the proportionality constant between the heat Q that the object absorbs or loses and the resulting temperature change D T of the object. That is, -----(i) Where, T i and T f are the initial and final temperatures..

>Thus, if a solid is heated, its molecules vibrate more vigorously within the intermolecular space. Its internal energy increases and hence, its temperature increases. If the solids are heated further, at a certain stage their kinetic energy increases so much that many..

Introduction - Heat is a form of energy. Heat energy is also called thermal energy. When heat is given to a body, its temperature increases and when heat is removed from a body, its temperature decreases. Heat is a measurable qua..

The amount of heat evolved or absorbed in a reaction is known as heat of reaction. As the amount of heat evolved or absorbed at constant temperature and pressure is called enthalpy, the heat changes for various reactions may also be ..

Heat is a very powerful form of energy. Although there are other forms of energy like light and electricity, heat is the most commonly used agent for initiating all chemical changes. Various classes of substances undergo decomposition to various extents when heate..

In many instances, the most convenient unit for specifying the amount of a substance is the mole, where 1 mole = 6.023 x 10 2 3 elementary units of any substance. Thus, 1 mole of aluminum means 6.023 x 10 2 3 atoms (the atom being the elementary unit), and 1 mol of aluminum oxide means 6.023 x 10 2..

The amount of heat evolved or absorbed in a reaction is known as heat of reaction. As the amount of heat evolved or absorbed at constant temperature and pressure is called enthalpy, the heat changes for various reactions may also be called..

Heating Effects: Joule's Law - When a potential difference is applied across the ends of a conductor, the free electrons are accelerated and acquire kinetic energy. As the electrons move through, they collide with the positive ions and atoms of the conductor and transfer their kinetic ene..

The reaction in which an acid and a base react to give a salt and water is called neutralization reaction. Neutralization reactions are exothermic in nature. The heat change when one gram equivalent of an acid is completely neutralised by a base or vice versa in dilute solution..