Thermodynamics and Thermochemistry
5.0 Internal Energy
5.0 Internal Energy
The total energy contained in a system is called it's internal energy or intrinsic energy. This is denoted by a symbol $E$ or $U$. Change in internal energy $ = \Delta E$
If internal energy is increased $ \Rightarrow \Delta E > 0$ $\left[ {\Delta E = positive} \right]$
If internal energy is decreased $ \Rightarrow \Delta E < 0$ $\left[ {\Delta E = negative} \right]$
