F.Sc Chemistry
What are the units of heat?
Heat is a form of energy which has the units of calorie and joule. Read More →
What is due to kinetic energy of a gaseous substance?
The kinetic energy of the molecules of the gaseous substance is due to the sum of all possible motions. These motions are translational, rotational, and vibrational. Read More →
What are the reactions which give the stable products?
Most of the chemical reactions, which give the stable products are exothermic reactions. In the exothermic reaction the heat content of the products is less than the heat contents of the reactants. Read More →
What happens to the enthalpy change when the coefficients of a chemical equation are doubled?
When the coefficient of a chemical equation are doubled, then the amount of enthalpy change also doubled. The reason is that we have to multiply the whole equation with two. Read More →
Which one of the apparatus is used for the measurement of enthalpy of combustion for a substance?
In order to calculate the heat of combustion of the substance, bomb calorimeter is used. In this calorimeter, the compound is burnt in the atmosphere of oxygen. Read More →
What is called the heat absorbed when the volume of the system remains constant and heat is absorbed by the system?
The amount of heat supplied at constant volume is internal energy change of system. Read More →
What are the enthalpies of all elements in their standard state?
The enthalpies of all elements in their standard states are zero. Read More →
What are called the atoms or group of atoms which are electrically charged?
The atoms or group of atoms which are electrically charged are called ions. Read More →
What forms the elements with seven electrons in their outermost orbital?
Those elements of the periodic table which have seven electrons in outermost shell have a tendency to accept one electron and complete their octet. In this way, they make the negative ion. Read More →
What is the valency of an atom according to valence bond theory?
Unpaired electrons in the outermost orbitals determine the valency of the elements. Read More →
