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Thermal Physics · thermodynamics

First Law of Thermodynamics

Relates internal-energy change to heat and work under the source convention.

ΔU = Q + W

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Variables

ΔU
internal-energy changeJ
Q
heat added to systemJ
W
work done on systemJ

Conditions / notes

The sign of W follows the convention shown: work done on the system is positive.

Reference details

Subject
Thermal Physics
Topic
thermodynamics
Plain text
delta U = Q + W

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