Question

Sort the following by energy mass density (MJ/kg) from most energy dense to least energy dense:

A) Uranium
B) Li batteries
C) Anthracite coal
D) Liquid H2

Answer 1

Based on theoretical maximums and common usage, the materials sorted from most energy dense to least are Uranium, Liquid H2, Anthracite coal, and Li batteries.

Step-by-step explanation:

To sort Uranium, Li batteries, Anthracite coal, and Liquid H2 by energy mass density (MJ/kg) from most energy dense to least energy dense, we should consider the energy each material can release per unit of mass. However, as exact energy densities for these materials are not provided in the question, we will make educated assumptions based on common knowledge of their typical energy content.

Uranium, used in nuclear reactions, has an incredibly high energy density because of the release of nuclear energy. Liquid hydrogen (H2) has a high chemical energy density, particularly when used as a rocket fuel, requiring only a modest volume to store a substantial amount of energy. Anthracite coal is a type of coal with a high carbon content and is used as a solid fuel with a moderate energy density. Lastly, Li batteries, while high for an electrochemical store of energy, typically have a lower energy density when compared to the energy released by combustible fuels or nuclear reactions.

Therefore, assuming typical conditions and the highest theoretical energy releases:

1. Uranium
2. Liquid H2
3. Anthracite coal
4. Li batteries