Combustion of Alkanes
What is combustion?
Combustion is a chemical process where a fuel reacts with oxygen and releases heat. The fuel can either be a solid, liquid or gas and the oxidizer, the source of oxygen can also be a solid liquid or gas. A new chemical substance is created from the fuel and source of oxygen. These new chemical substances are referred to as exhaust.
For combustion to occur, a fuel, oxygen and heat are required.
In an alkane, the more carbon atoms that are present, the more heat that is produced because of combustion.
Examples of Alkane Fuels:
• Methane – main alkane present in natural gas (e.g. North Sea gas)
• Propane – used in camping gas
• Butane – Calor gas (a brand of bottled gas used in Britain and Ireland)…
graph and a set of sample calculations are included which will show how the values for the enthalpy of combustion of the fuel sources are deduced.
Graph 1: Scatter plot showing the change in the temperature of 80.0mL of distilled water in the tin calorimeter during and after the combustion of the kerosene for the first conducted trial.
The linear trendline was created for the last three data points, where the water was allowed to cool, which was then extrapolated backwards to account for the…
A combustion reaction (also known as burning) is an exothermic reaction in
which something reacts with oxygen. Combustion reactions are known to be one of
the most common types of reactions, they don’t need a lot to happen, there only needs
to be an excess amount of oxygen, and with the excess amount, the combustion is
called a complete combustion reaction. But with a little amount, the reaction is called
an incomplete combustion reaction. The products in a complete combustion reaction
The change in enthalpy for the combustion of magnesium metal
Hess’s law of heat summation states that the value of DH for a
reaction is the same whether it occurs directly or as a series of…
The NOx Problem
1. History of Diesel
The diesel engine is a Compression Ignition (CI) Internal Combustion Engine (ICE) that was invented by Rudolf Diesel, a German engineer in 1892. Unlike a Sparked Ignition (SI) engine, Diesel designed the engine to run on vegetable oil, more specifically peanut oil.
2. CI vs SI, the difference
As its name suggests, the CI engine’s ignition of the air-fuel mixture is caused by the mechanism compression rather than a spark from a spark plug of SI engine.
Combustion Engine Versus Eco-Friendly Engine
As the population becomes dependent on the environment, environmentally friendly vehicles have appeared as an alternative to gas-powered vehicles. Many methods exist to power SUV’s, trucks, and cars. Vehicles are powered by the combustion of both gasoline and diesel fuel. The transportation industry is drastically trying to improve its methods for reducing its greenhouse gas emissions and pollutants to the environment. Electric cars notably are…
Heat of Combustion of Magnesium
Hypothesis: Hess’s law states that “the enthalpy change for the conversion of reactants to products is the same whether the conversion occurs in one step or several steps” (DiGiuseppe et al,2012,p.314 ). A series of two experiments will perform in this lab in order to find ΔH1 and ΔH2 . In addition, ΔH3 will be obtained by reference. It is predicted that the combustion of magnesium will have a negative enthalpy, since combustion is an exothermic reaction. Also…
Calculating the Enthalpy Change of Combustion of Five Different Alcohol Fuels Including Methanol, Ethanol, Propanol, Butanol and Pentanol by Heating and Measuring the Change in Temperature of Water using a Temperature Probe
The enthalpy change of combustion can be calculated using the formula △H = MC△T, where △H is the enthalpy change in kJ mol-1, M is the mass in kilograms, C is the specific heat capacity in kilojoules, and △T is the temperature change in kelvins.
this reaction takes place:
CaC_(2(s))+〖2H_2 O〗_((l)) □(→) C_2 H_(2(g))+Ca(OH)_(2(s))
After the Acetylene gas is created it is mixed with a certain amount of Oxygen gas to create a specific ratio. Once both gases are in the pipet bulb, the contents can be placed on a ramp and have the lighter with an open flame at the open end of the bulb. The second reaction that takes place is:
2C_2 H_(2(g))+5O_(2(g))→4CO_(2(g))+2H_2 O_((g))+ Heat
This reaction within the pipet bulb is called a combustion…
A chimney is a vertical flue. Its function is to allow smoke, gases, and anything else created by incomplete combustion to escape a room. The flue makes sure all the “byproducts of combustion do not back up into a room. It carries away gases and smoke with minimal heat loss, so that the fire provides warmth without endangering the people indoors” (McMahon, 2015).
Draft is the the movement of air going up a chimney. When a chimney is filled with hot air a strong draft pulls air from the…