energy energy from chemical reactions

Energy changes in chemical reactions can also take place in forms other than heat, such as light, electricity, mechanical energy, etc. Some common examples are: The burning of petrol or diesel in motor engines of cars, trucks, tractors or buses produces me..

Every substance possesses a definite quantity of energy, under a given set of factors such as chemical nature of the substance, temperature and pressure. The total energy contained in a system or substance is called its internal energy or intrinsic ..

Nuclear Energy and Chemical Energy - Nuclear energy is released when very small particles of matter split or combine. After the split or combination, they result in small particles or heavy particle. The rest of the mass is changed into energy. This..

A stable chemical compound has less energy than its separated parts, the difference being in the specific arrangement and motion of electrons and nuclei in the compound. This difference is called chemical energy or energy of chemical bind..

Collision Theory - From Arrhenius equation, it is seen that the rate constant k of a reaction increases with temperature and therefore, the rate of reaction also increases. Why does k depend on temperature? This can be explained, to a certain extent, by collision theory. Accordi..

. The ATP molecules transfer energy to other biological molecules. ATP (adenosine triphosphate) is an energy rich compound having three phosphate group attached to a nucleoside of adenine (a nitrogen base), called adenosine (adenine + pentose sugar). Of the three phosphate group..

fig 6.12 - Distribution of kinetic energy of molecules in a gas It is observed that the energy distribution curve is flatter at higher T and is shifted toward higher energy region. This is because, the kinetic energy of the molecules are higher at higher temp..

) the condition of temperature and pressure. The various energies which contribute towards internal energy are: (a) Translational energy of the molecules (E t ) (b) Rotational energy of the molecules (E r ) (c) Vibrational energy of the molecules (E..

Chemical Reactions - Chemical reactions are the processes in which new substances with new properties are formed. A chemical reaction should satisfy the following conditions: There must not be either a gain or loss of matter. There must be..

, D S t o t a l is positive so that D G = -ve for spontaneous chemical changes. Thus, the spontaneity of a chemical change can be predicted either by (i) T D S system = +ve or (ii) D G = -ve. The use of Gibbs free energy change has the advantage because it refers to sy..