What is the relation between enthalpy and internal energy
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The relationship between the change in the internal energy of the system during a chemical reaction and the enthalpy of reaction can be summarized as follows. 1. The heat given off or absorbed when a reaction is run at constant volume is equal to the change in the internal energy of the system.
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H = U + PV
Where, H is the total enthalpy
U = internal energy
and P = pressure and V is volume
Now,
The actual formula becomes
∆H = ∆U + ∆(PV) because it's not significant to calculate and it's also not easy to calculate either the total internal energy or the enthalpy of any system however it's good to calculate change in these quantities after a process is performed on the chosen system.
Hope this helps you!
Where, H is the total enthalpy
U = internal energy
and P = pressure and V is volume
Now,
The actual formula becomes
∆H = ∆U + ∆(PV) because it's not significant to calculate and it's also not easy to calculate either the total internal energy or the enthalpy of any system however it's good to calculate change in these quantities after a process is performed on the chosen system.
Hope this helps you!
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