Question

What should be the minimum sample weight for a calorimeter test?

How can we get the net calorific value?

Answer 1

Answer:

Combustion in essence is the chemical combination of a combustible fuel with oxygen and this in turn results in the production of heat energy. Combustion is achieved by combining the two key elements of combustion a fuel and oxygen, at an elevated temperature or an ignition temperature. The chemical breakdown is simple enough with a decent understanding of the  periodic table. The air around us supplies the oxygen, which will bond with hydrogen, carbon and other smaller elements within a fuel to produce the by product of heat. The principle of combustion is vital to modern day industry and engineering. Equipment and technology is required to burn solid liquid and gaseous fuels to a high heat recovery standard and to ensure the desired amount of heat is obtained from any fuel and ensure very little waste product is left over after combustion of the fuel. The basic functionality required from such equipment designs is namely to provide a supply of oxygen and mixed fuel in the desired ratio. Too much of either of these ingredients would lead to improper and unsatisfactory combustion of the fuel itself. The high temperature during combustion must also be confined and retained (access engineering). Wood coal and simple fuels like this are the combustible substances which in coming in contact with an air supply produce large amounts of heat energy. The term combustion itself refers to the exothermal oxidation of a fuel by oxygen within the air at a rapid rate to produce

Explanation: