enthormic
Well those would typically be called exothermic reaction, which could include any reaction in which heat was not added to start the reaction, like the addition of sodium to water, or the combination of an acid and base, like sodium hydroxide and hydrochloric acid.
Any chemical reaction that produces energy is exothermic. A erection that requires energy is endothermic. For instance, NaCl + H20 -> HCl + NaOH is endothermic. Run the equation the opposite direction, HCl _+ NaOH -> NaCl + H20 and it's an exothermic reaction.
'Exothermic' means to give out energy (heat). So combusting anything such as petrol/gasoline in a car engine is exothermic because it feels hot(heat) after while. In the lab. a lit Bunsen Burner is exothermic , because you are combusting a gas to make heat (energy).
Combustion of fuels like wood or gasoline releases heat and light energy, making it an exothermic reaction. The reaction between sodium and chlorine to form sodium chloride (table salt) releases heat, demonstrating an exothermic process.
Yes, diesel and gasoline have different densities, with diesel being heavier than gasoline. If you mix them in a container, they will not completely separate, but the diesel will sink and the gasoline will float on top due to the difference in density.
Gas
Solid to gas (sublimation) is endothermic (takes in heat).In other words:A phase change from the solid state to the gas state is endothermic.Sublimation is endothermic (takes in energy).Heat energy must be provided to make it work.When there is a change of state from a solid to a liquid, a solid to a gas, or a liquid to a gas, at a constant temperature, the process is endothermic NOT exothermic. It requires energy to break the intermolecular forces that keep the molecules together, and that reduces the temperature - heat is taken in.
Both burning a log in a fireplace and burning gasoline in a car are examples of exothermic reactions. These reactions release energy in the form of heat and light as they occur. The heat and light produced during the combustion process are key to generating the energy needed to heat a room or propel a vehicle.
Well those would typically be called exothermic reaction, which could include any reaction in which heat was not added to start the reaction, like the addition of sodium to water, or the combination of an acid and base, like sodium hydroxide and hydrochloric acid.
Any chemical reaction that produces energy is exothermic. A erection that requires energy is endothermic. For instance, NaCl + H20 -> HCl + NaOH is endothermic. Run the equation the opposite direction, HCl _+ NaOH -> NaCl + H20 and it's an exothermic reaction.
'Exothermic' means to give out energy (heat). So combusting anything such as petrol/gasoline in a car engine is exothermic because it feels hot(heat) after while. In the lab. a lit Bunsen Burner is exothermic , because you are combusting a gas to make heat (energy).
Combustion of fuels like wood or gasoline releases heat and light energy, making it an exothermic reaction. The reaction between sodium and chlorine to form sodium chloride (table salt) releases heat, demonstrating an exothermic process.
The energy release is exothermic although the exothermic reaction is not the goal. The goal is rapid expansion of gases in order to move the pistons away from the cylinder head. Heat is a by product....and an unwanted one at that.
The main differences between exothermic reactions and endothermic reactions are: Exothermic reactions are reactions that give off energy (light, electrical or mainly heat), causing the surroundings to warm up. Endothermic reactions are reactions that absorb energy, causing the surroundings to cool down. The products of an exothermic reaction have less energy, or less total enthalpy, than of it's reactants. This is due to the reactants containing more stored energy because energy from external sources is not required. This also gives the products more stability because in order to achieve a reversible reaction and break the chemical bonds of the products, you will need to apply more energy to it. The opposite is for endothermic reactions. The products of the reaction have a greater total enthalpy of the reactants, causing the reactants stored energy to decrease. This produces less stable products that need less energy to break their bonds in a reversible reaction. Finally most exothermic reactions are spontaneous, where as most endothermic reactions are not spontaneous as they generally need energy applied to them before they start.
an exothermic reaction
You don't.
14