Define spontaneous reaction with example
admin 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…
Free Energy and Chemical Equilibria
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…
What is Stoichiometric Coefficient?
Stoichiometric coefficient: The number of molecules of a reactant taking part in a reaction is known as Stoichiometric coefficient. For example: Consider the following equation: aA + bB ⇌ cC…
What are the different types of Chemical Equilibria?
There are two types of chemical equilibria: 1. Homogeneous equilibrium 2. Heterogeneous equilibrium 1. Homogeneous equilibrium: The equilibrium reactions in which all the reactants and the products are in the…
What are the applications of the Equilibrium Constant?
Applications of the equilibrium constant 1. The magnitude of the equilibrium constant : The magnitude of the equilibrium constant K means the extent to which a reaction can proceed i.e.…
What are the characteristics of Equilibrium Constant?
The important characteristics of equilibrium constant are discussed below: 1. The equilibrium constant has a definite value for every reaction at a particular temperature. 2. The value of equilibrium constant…
An equilibrium system for the reaction between hydrogen and iodine to give hydrogen iodide at 670 K in a % litre flask contains 0.4 mole of hydrogen, 0.4 mole of iodine and 2.4 moles of hydrogen iodide. Calculate equilibrium constant.
Reaction will be given as: H2 (g) + I2 (g) = 2 HI (g) Therefore, the equilibrium constant K will be given as: K = 2 / The molar concentrations…