General Questions These questions are not explicitly keyed to chapter topics; many requ...

General Questions

These questions are not explicitly keyed to chapter topics; many require integration of several concepts.

Uranium-235 is used as a fuel in nuclear power plants. Since natural uranium contains only a small amount of this isotope, the uranium must be enriched in uranium-235 before it can be used. To do this, uranium(IV) oxide is first converted to a gaseous compound, UF₆, and the isotopes are separated by a gaseous diffusion technique. Some key reactions are

How much thermal energy transfer (at constant pressure) would be involved in producing 225 ton UF₆(g) from UO₂(s) (1 ton = 9.08 × 10⁵ g)? Some necessary standard enthalpies of formation are