temperature and heat flow

Heat and Temperature - Heat energy is present in every object above absolute zero. How do we know that heat is present in every object? Temperature of the body is an indication. (Absolute zero is the lowest temperature possible and is equa..

Heat energy is present in every object above absolute zero. How do we know that heat is present in every object? Temperature of the body is an indicatio..

Energy Flow - All living beings require a constant supply of energy for the various functions they perform. The energy is obtained from the sun. This energy is introduced into the biosphere by green plants by a process known as photosynthesis. Plants are able to trap this light energy and..

Although matter circulates, energy cannot be reused indefinitely. Solar energy is converted by the photosynthetic producers (plants) into chemical energy in the form of plant carbohydrates. Herbivores consume the plant carbohydrates and so this chemical energy is transferred to them. Carnivores con..

Energy is the capacity to do work. Solar energy is transformed into chemical energy by the process of photosynthesis, and is stored in plant tissue and then transformed into mechanical and heat forms during metabolic activities. The energy, in the biological world, flows from th..

Energy exchanged between the system and the surroundings when they are at different temperatures is commonly known as heat. If a system is at a higher temperature than the surroundings, then there is a flow of heat (or energy) from system to surrou..

Increase in temperature, decreases the solubility of the solute. On heating, the gases dissolved in milk escape making the milk bubble and boil ov..

Certain chemical reactions do not take place at room temperature but occur readily at a higher temperature. Accordingly, heat is required to start the reaction e.g. fuels like coal and wood only start burning when heated to a certain temperature cal..

The substance, which dissolve in a solvent with absorption of heat (e.g., NH 4 Cl, KNO 3 , NaNO 3 etc.) show an increase in solubility with increase in temperature, whereas the solubility of substances which dissolve with evolution of heat (e.g. NaOH, (CH 3 COO) 2 Ca..

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..