At standard temperature and pressure, the density of hydrogen gas comes in at a mere 0.082 kg/m³. It’s hard to overstate just how light that is. This number makes hydrogen the lightest element known to exist, a fundamental fact that shapes everything about how we...
If you're trying to get a handle on the price of hydrogen, the first thing to know is that not all hydrogen is created equal. The cost per kilogram can swing wildly depending on how it’s made. Right now, in early 2026, the market looks something like this: Grey...
When you look at hydrogen as a fuel source, you quickly run into a fascinating contradiction. On one hand, hydrogen is the king of energy when you measure it by weight. But when you measure it by volume, it's surprisingly weak. This creates a real-world puzzle: a...
The heat capacity of hydrogen gas tells us a simple but critical piece of information: how much energy it takes to make it hotter. When you look at hydrogen, one thing stands out immediately—it heats up and cools down much faster than other common fuels. This quick...
When people talk about the price of hydrogen per kilogram, they're not talking about one single number. The reality is a huge range, stretching from $1-$2 for grey hydrogen all the way to over $6 for green hydrogen—and that's before you even factor in the...
