Explain Lambert-Beer Law?
admin According to Lambert-Beer law, when a beam of monochromatic radiation passes through any solution, the intensity of the beam reduces to some amount. Let if I0 is the intensity of…
April 2025
What are the reasons of Low Quantum Yield?
1. The primary photochemical process may get backtracked due to any reason. 2. The broken molecules may combine with each other resulting in the formation of the original molecule. 3.…
What do you mean by thermochemistry?
The chemical reactions which take place with energy changes are known as thermochemistry. A thermochemistry deal with energy changes and it is a branch of chemistry. The energy changes occur…
Explain the change of internal energy in a chemical reaction and prove that internal energy is a definite quantity
Change of internal energy in a chemical reaction: The energy associated with the random, disordered motion of molecules is called Internal energy. Internal energy is a state property i.e. its…
What will be the change of enthalpy in a chemical reaction at constant pressure?
The quantity U + PV is known as the enthalpy of the system. It is denoted by H. It represents the total energy stored in the system. Thus H =…
Define spontaneous reaction with example
Spontaneous reaction is those which proceed at very fast rate. A chemical reaction which is accompanied by evolution of heat is known as exothermic reaction. Spontaneous reactions are also known…
Discuss the free energy of a spontaneous reaction
If the free energy change i.e. ∆G of a chemical reaction is positive, the reaction would not proceed. If the free energy change i.e. ∆G of a chemical reaction is…
What is the role of temperature in the spontaneity of the reaction?
Mathematically, G = H – TS At constant temperature, ∆G = ∆H – T∆S Hence two factors contribute to the value of free energy ∆G. One is energy factor ∆H…
Define Chemical Equilibrium with example?
The state at which the concentrations of reactants and products do not change with of a chemical reaction is known as chemical equilibrium. When the reactants are mixed together in…
Explain the law of Chemical Equilibrium and Equilibrium Constant?
Norwegian Chemists Waage and Gulberg were the ones who gave us law of mass action. This law of mass action suggest a quantitative relationship between the rates of the reaction…