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What is the difference of enthalpy of formation and the enthalpy of combustion?
Wiki User
∙ 10y ago
Enthalpy of combusion is energy change when reacting with oxygen. Enthalpy of formation is energy change when forming a compound. But some enthalpies can be equal.ex-Combusion of H2 and formation of H2O is equal
Wiki User
∙ 10y ago
The enthalpy of formation is the change in enthalpy that occurs when 1 mole of a compound is formed from its elements in their standard states. The enthalpy of combustion is the change in enthalpy that occurs when 1 mole of a substance is completely burned in oxygen. In short, enthalpy of formation is for the formation of a compound, while enthalpy of combustion is for the complete burning of a substance.
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How do i get the heat of combustion of c25h52?
To calculate the heat of combustion of C25H52, you can use the standard enthalpies of formation for C25H52, CO2, and H2O. The heat of combustion is the difference in enthalpy between the products (CO2 and H2O) and the reactant (C25H52), which can be calculated using Hess's Law. Alternatively, you can look up the heat of combustion value for C25H52 in chemical databases or literature sources.
How is the enthalpy of reaction related to the enthalpies of formation for the products and reactants?
The difference between the enthalpy of formation of the products minus the enthalpy of formation of the reactants is the enthalpy of the reaction
How is Hf related to the H of a reaction?
The Hreaction is the difference between Hf, products and Hf, reactants
What is the enthalpy change to burn 37.5 g of ammonia?
The enthalpy change to burn 37.5 g of ammonia (NH3) can be calculated using the standard enthalpy of formation of ammonia and the balanced chemical equation for its combustion. The enthalpy change will depend on the specific conditions of the reaction, such as temperature and pressure.
What is the specific enthalpy of combustion of ethane?
The specific enthalpy of combustion of ethane is approximately -1560 kJ/mol.
How do i get the heat of combustion of c25h52?
To calculate the heat of combustion of C25H52, you can use the standard enthalpies of formation for C25H52, CO2, and H2O. The heat of combustion is the difference in enthalpy between the products (CO2 and H2O) and the reactant (C25H52), which can be calculated using Hess's Law. Alternatively, you can look up the heat of combustion value for C25H52 in chemical databases or literature sources.
How is the enthalpy of reaction related to the enthalpies of formation for the products and reactants?
The difference between the enthalpy of formation of the products minus the enthalpy of formation of the reactants is the enthalpy of the reaction
How is Hf related to the H of a reaction?
The Hreaction is the difference between Hf, products and Hf, reactants
What is the enthalpy change to burn 37.5 g of ammonia?
The enthalpy change to burn 37.5 g of ammonia (NH3) can be calculated using the standard enthalpy of formation of ammonia and the balanced chemical equation for its combustion. The enthalpy change will depend on the specific conditions of the reaction, such as temperature and pressure.
What is the specific enthalpy of combustion of ethane?
The specific enthalpy of combustion of ethane is approximately -1560 kJ/mol.
Why does oxygen gas not have an enthalpy of formation but ozone does?
Oxygen gas (O2) does not have an enthalpy of formation because it is an element in its standard state, which has an enthalpy of formation of zero by definition. Ozone (O3), on the other hand, is a compound and has a defined enthalpy of formation because it is formed from its elements in their standard states.
What does the negative sign on the value of an enthalpy of formation indicate?
A negative enthalpy of formation indicates that energy is evolved.
What do the symbols mean Delta Hr Hf Hc Hn Ha in chemistry btw i know theyre enthalpy changes?
ΔH: Represents the change in enthalpy of a reaction. ΔHf: Standard enthalpy of formation, which is the enthalpy change when one mole of a substance is formed from its elements in their standard states. ΔHc: Standard enthalpy of combustion, which is the enthalpy change when one mole of a substance is completely burned in oxygen. ΔHn: Standard enthalpy of neutralization, which is the enthalpy change when an acid and a base react to form one mole of water under standard conditions. ΔHa: Standard enthalpy of atomization, which is the enthalpy change when one mole of gaseous atoms is formed from an element in its standard state.
Which represent(s) a chemical property?
· General chemical properties: - Pauling electronegativity - Period - Group - Flammability - Corrosivity - Heat of combustion - Enthalpy of formation Valence (oxidation states)
What is the enthalpy of calcium chloride?
The enthalpy of formation of calcium chloride is -795.8 kJ/mol.
How bond formation and bond breaking related to enthalpy?
Bond formation is an exothermic process, meaning it releases energy, while bond breaking is an endothermic process, meaning it requires energy input. The enthalpy change for a reaction is determined by the difference between the energy released from bond formation and the energy required for bond breaking. If more energy is released during bond formation than is required for bond breaking, the overall reaction is exothermic and vice versa.
What is the standard enthalpy of formation of coconut oil?
The standard enthalpy of formation of coconut oil is not a well-defined value as it is a complex mixture of triglycerides, which are composed of various fatty acids. The enthalpy of formation of each individual fatty acid can be determined, but not for coconut oil as a whole.
