Question

The density of H2gas at 1 atm and 25°C is 0.9 kg/m3. In a futuristic micro-cryo storage
of hydrogen, to be used for distributed energy generation in a rhodium catalyzed
proton exchange membrane cell, atomic hydrogen will be stored in canisters at a
density such that the interatomic distance would be the minimum permitted by the
geometry of the atoms. If hydrogen atoms are considered to be spheres of radius 0.5 Å
at what density would hydrogen be stored in the canister? (Neglect volume of
interatomic voids) Answer in kg/m². Take 7 = 3, 1amu = 2 x 10-27 kg.​

Answer 1

Answer:

Hydrogen storage is a term used for any of several methods for storing hydrogen for later use. These methods encompass mechanical approaches such as high pressures and low temperatures, or chemical compounds that release H2 upon demand. While large amounts of hydrogen is produced, it is mostly consumed at the site of production, notably for the synthesis of ammonia. Interest in hydrogen storage is driven by the idea that it could be a medium for storing energy, e.g. to compensate for intermittent energy sources. The overarching challenge is the very low boiling point of H2: it boils around 20.268 K (−252.882 °C or −423.188 °F). Achieving such low temperatures requires significant energy.

Explanation: