HYARC
Hydrogen Properties
Discover the Remarkable Properties of Hydrogen

Data Type

Keywords

Air and Water Thermal Properties and Gas Constants
Contains data on the heats of fusion and vaporization for water, heat capacities of air and water, and gas constants.
Hydrogen Mass and Volume Conversion Factors
Hydrogen mass and volume conversion factors at common temperatures and pressures. Data from NIST.
Hydrogen Production Energy Conversion Efficiencies
Contains energy inputs, energy outputs, and overall conversion efficiencies for various hydrogen production processes.
Inventory of U.S. Over-the-Road Hydrogen-Powered Vehicles
This spreadsheet provides numbers of and characteristics of hydrogen vehicles currently operating and planned for operation within the United States.  Over-the-road vehicles are the intended scope of this census; other types of hydrogen…

This material was prepared as an account of work sponsored by an agency of the United States Government.
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The portal brings together and enhances the utility of a variety of tools and web-based content on the safety aspects of hydrogen and fuel cell technologies to help inform those tasked with designing, approving or using systems and facilities, as well as those responding to incidents.

Copyright © 2025 by H2Tools; H2 Tools is intended for public use. It was built, and is maintained, by the Pacific Northwest National Laboratory with funding from the DOE Office of Energy Efficiency and Renewable Energy's Hydrogen and Fuel Cell Technologies Office. All Rights Reserved
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