False: Internal Energy of A & B is Not Determined by T Alone

AI Thread Summary
The assertion that the internal energy of two systems, A and B, consisting of pure liquid water at 1 bar pressure, is solely determined by their temperatures (TA and TB) is false. Internal energy (U) is influenced not only by temperature but also by the number of particles (n) and the specific energy states of the molecules, which can vary independently of temperature. Therefore, system B could have a higher internal energy despite a lower temperature if it has more molecular energy contributions. The discussion emphasizes that U is a function of both temperature and the amount of substance, highlighting the complexity of energy states in thermodynamics. Understanding these relationships is crucial for accurately assessing internal energy in thermodynamic systems.
sparkle123
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Homework Statement


Why is this false?
"if systems A and B each consist of pure liquid water at 1 bar pressure and if TA>TB, then the internal energy of system A must be greater than that of B"


Homework Equations





The Attempt at a Solution


It seems true to me. Could it be that B has more molecular translational, rational, vibrational, electronic energies? but then wouldn't t be higher?
also i thought U was a function of T.
 
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sparkle123 said:

Homework Statement


Why is this false?
"if systems A and B each consist of pure liquid water at 1 bar pressure and if TA>TB, then the internal energy of system A must be greater than that of B"


Homework Equations





The Attempt at a Solution


It seems true to me. Could it be that B has more molecular translational, rational, vibrational, electronic energies? but then wouldn't t be higher?
also i thought U was a function of T.
U is a function of n and T.

AM
 

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