How to Relate the Change in Enthalpy to the Change in Internal Energy for a Given Reaction - Part 1

In thermodynamics the reference is the internal energy (in chemistry).


The internal energy of a thermodynamic system is the energy of the system as a state function, measured as the amount of energy required to bring the system from its standard internal state to its internal state of interest.

Question:

ΔUѲ of combustion of Methane is – X kJ mol–1. What’s the value of ΔHѲ?

Solution:



Click to enlarge the image


DHѲ = Standard change in enthalpy, DUѲ = Standard change in internal energy, Dng = Change in moles of gaseous molecules, R = Universal gas constant, T = Absolute temperature

That's simple math, isn't it❓ Let Chemaficionado know at mychemistryhomework@gmail.com❗

Reference:

Internal energy. Wikipedia. https://en.wikipedia.org/wiki/Internal_energy.

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