Find free online Chemistry Topics covering a broad range of concepts from research institutes around the world. Second Law of Thermodynamics Need for the Second Law of Thermodynamics: We know from the first law of thermodynamics, the energy of the universe is conserved. Let us consider the following processes: 1. A glass of hot water over time loses heat energy to the … [Read more...] about Second Law of Thermodynamics
Chemistry
Latice Energy (ΔHlattice)
Find free online Chemistry Topics covering a broad range of concepts from research institutes around the world. Latice Energy (ΔHlattice) Lattice energy is defined as the amount of energy required to completely remove the constituent ions from its crystal lattice to an infinite distance from one mole of crystal. It is also referred as lattice enthalpy. NaCl(s) → Na+(g) + … [Read more...] about Latice Energy (ΔHlattice)
Hess’s Law of Constant Heat Summation
Find free online Chemistry Topics covering a broad range of concepts from research institutes around the world. Hess's Law of Constant Heat Summation We have already seen that the heat changes in chemical reactions are equal to the difference in internal energy (ΔU) or heat content (ΔH) of the products and reactants, depending upon whether the reaction is studied at constant … [Read more...] about Hess’s Law of Constant Heat Summation
Measurement of ΔU and ΔH Using Calorimetry
Find free online Chemistry Topics covering a broad range of concepts from research institutes around the world. Measurement of ΔU and ΔH Using Calorimetry Calorimeter is used for measuring the amount of heat change in a chemical or physical change. In calorimetry, the temperature change in the process is measured which is inversely proportional to the heat change. By using … [Read more...] about Measurement of ΔU and ΔH Using Calorimetry
Thermochemical Equations:
Find free online Chemistry Topics covering a broad range of concepts from research institutes around the world. Thermochemical Equations: A thermochemical equation is a balanced stoichiometric chemical equation that includes the enthalpy change (ΔH). The following conventions are adopted in thermochemical equations: 1. The coefficients in a balanced thermochemical equation … [Read more...] about Thermochemical Equations: