A better estimate may be the Lower Heating Value (LHV) which is adjusted by adding the heat of vaporization of water, and heat required to raise the temperature of reactants to the combustion temperat...A better estimate may be the Lower Heating Value (LHV) which is adjusted by adding the heat of vaporization of water, and heat required to raise the temperature of reactants to the combustion temperature and products to 150 o C (an arbitrarily chosen standard). This is still different from the LHV because of the heat required to change the temperature of the reactants and products from the standard temperature (25 o C) to the combustion temperature.
where \(P\) is the absolute pressure of a gas, \(V\) is the volume it occupies, \(N\) is the number of atoms and molecules in the gas, and \(T\) is its absolute temperature. The ideal gas law relates ...where \(P\) is the absolute pressure of a gas, \(V\) is the volume it occupies, \(N\) is the number of atoms and molecules in the gas, and \(T\) is its absolute temperature. The ideal gas law relates the pressure and volume of a gas to the number of gas molecules and the temperature of the gas. the physical law that relates the pressure and volume of a gas to the number of gas molecules or number of moles of gas and the temperature of the gas