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The change in internal energy for the combustion of 1.0 of octane at a pressure of 1.0 is 5084.1 If the change in enthalpy is 5074.3 how much work is done during the combustion?
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∙ 12y ago
-9.8 kJ
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∙ 12y ago
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What is the difference of enthalpy of formation and the enthalpy of combustion?
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
How do i get the heat of combustion of c25h52?
You're gonna need an enthalpy change of formation table.
Why is the enthalpy change of combustion for methanol less negative than methane?
The combustion of methanol to form products of H2O and CO2 do not have as much of an energy change compared to methane and a result methanol releases less energy compared to methane. The more negative an enthalpy change is, the more heat it is going to release.
What special name is given to a heat change at constant pressure?
Enthalpy
Why is the enthalpy change of combustion always negative?
It is and exothermic reaction, which means energy is given out heating the surroundings.
What is the difference of enthalpy of formation and the enthalpy of combustion?
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
How do i get the heat of combustion of c25h52?
You're gonna need an enthalpy change of formation table.
What is the standard molar enthalpy change of combustion for coconut oil?
Coconut oil is a mixture not a compound.
Why is the enthalpy change of combustion for methanol less negative than methane?
The combustion of methanol to form products of H2O and CO2 do not have as much of an energy change compared to methane and a result methanol releases less energy compared to methane. The more negative an enthalpy change is, the more heat it is going to release.
Is the heat content of a system at a constant pressure?
Yes it is possible, for example when water freezes there is a point when the temperature remains constant however energy is released as the water condenses.
What is the change of enthalpy associated with the combustion of one mole of pentane The chemical equation is C5H12 8 O2 yields 5 CO2 6 H2O?
The enthalpy associated with pentane is roughly 1 to 1 when combustion in a vacuum chamber, if you combustion it outside you will have a greater rate of loss from the pentane.
What special name is given to a heat change at constant pressure?
Enthalpy
Why can't the enthalpy change of combustion of CO2 be measured?
Because you can't combust CO2. CO2 is the final product of the combustion of carbon. You can't combust it further
Could you give me an equation for enthalpy?
enthalpy H i the sum of the internal energy U and the 'pV-energy'= p*V. The pV term is also called flow-energy, pressure-energy or energy of displacement. The p is the external pressure, but for systems at constant pressure it is also equal to the internal pressure. Hence: H=U+pV. It follows that H is a composite form of energy, a statement not commonly found in the literature. >> 'Energy-balance of the Joule-Thomson experiment: Enthalpy change at decompression.' (NPT-procestechnologie, 2010, 17(4)18-22)
What is relation between hydration energy lattice energy and enthalpy of solution?
enthalpy change of solution=enthalpy change of hydration - enthalpy change of lattice
What is the formula for calculating constant pressure of heat capacity?
Cp = ΔH/ΔT = (ΔU+pΔV)/ΔT Where Cp is heat capacity at constant pressure, ΔH is enthalpy change, ΔT is temperature change, ΔU is total internal energy change, and pΔV is pressure multiplied by change in volume.
One gallon of isooctane has a mass of 2.6 kg What is the change in enthalpy for the combustion of one gallon of this compound?
f**k i need this answer too
