Since the industrial revolution fuels have been used for power. Fossil fuels are organic matter made from remains of flora and fauna which has been subjected to immense pressure and heat deep within the earth over millions of years. Now fuels such as petroleum are used to power vehicles such as cars airplanes and ships (Mitshibishi Heavy Industries, 2015). Fuels are products that are burned to release energy in the form of heat or power, fuels are made out of coal, oil, natural gas, and wood and many more. Oil and natural gas is formed from remains of living things that died millions of years ago (Fact Monster, 2000-2015). Fuels are used for cars, airplanes and to power major factories for example power plants. They can be used to create medicine and cosmetics etc. (NMOGA, 2011- 2015).
Alcohols are compound that has one or more hydrogen atoms in an alkane which has been replaced by an –OH group (Chem Guide, 2003).The general chemical formula for alcohols is CnH2n+1OH (BBC, 2014).Alcohols are any of a class of organic compounds characterized by one or more hydroxyl (−OH) groups attached to a carbon atom of an …show more content…
This law is a manifestation that enthalpy is a state function. (UCDAVIS Chem Wiki 2015). The definition of Hess’s Law is that the heat of any ∆H○f for a specific reaction is equals to the sum the heats of reaction for any set of reactions which in sum are equivalent to the overall reaction. (UCDAVIS Chem Wiki 2015) Hess’s Law is mainly due to enthalpy being a state of function, which can calculate the overall change in enthalpy by adding up the changes for each step of the way until the product is made. All the steps have to continue at the exact same temperature and the equations for the single steps must balance out. An example of using Hess’s Law is shown below; (Chem Team,
Alcohols are compound that has one or more hydrogen atoms in an alkane which has been replaced by an –OH group (Chem Guide, 2003).The general chemical formula for alcohols is CnH2n+1OH (BBC, 2014).Alcohols are any of a class of organic compounds characterized by one or more hydroxyl (−OH) groups attached to a carbon atom of an …show more content…
This law is a manifestation that enthalpy is a state function. (UCDAVIS Chem Wiki 2015). The definition of Hess’s Law is that the heat of any ∆H○f for a specific reaction is equals to the sum the heats of reaction for any set of reactions which in sum are equivalent to the overall reaction. (UCDAVIS Chem Wiki 2015) Hess’s Law is mainly due to enthalpy being a state of function, which can calculate the overall change in enthalpy by adding up the changes for each step of the way until the product is made. All the steps have to continue at the exact same temperature and the equations for the single steps must balance out. An example of using Hess’s Law is shown below; (Chem Team,