# What is total enthalpy?

I've seen that it's defined as $$h_0 = h + \frac{v^2}{2}$$, where $$h_0$$ is the total enthalpy per unit mass. I can see that the $$\frac{v^2}{2}$$ term probably has something to do with kinetic energy, but I am still really confused. Doesn't $$h$$ already account for flow work? And also, how can both sides of the equation have the same units if $$h_0$$ is "per unit mass"?

• In chemistry, we don't usually throw things around, but if we will, they'll surely have an additional energy of $mv^2\over2$. – Ivan Neretin Aug 13 '19 at 10:05