# How is the First Law of Thermodynamics expressed mathematically?

May 16, 2017

See below.

#### Explanation:

The first law of thermodynamics is:
$\Delta$ U= $\Delta$ Q + $\Delta$ W

where $\Delta$U= internal energy of a system/J
$\Delta$Q = energy supplied to the system/J
$\Delta$W= work done on the system/J

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