Curium chemical data help
Curium chemical data help
(OP)
I am using ASPEN+ for a Cm/Am separation however the databank doesn't have Cm listed. I need some help filling in the data. I have Perry's but I can't seem to find an Cm info in Table 2-1 or anywhere else. Do you guys a) have this info or b) know where I can find it.
I need the specific gravity at 60F, the standard enthalpy of formation and standard Gibbs of formation.
Thanks for any help!
I need the specific gravity at 60F, the standard enthalpy of formation and standard Gibbs of formation.
Thanks for any help!





RE: Curium chemical data help
I don't think you"ll find these properties on the net or in university chemistry books. Try a good library for books on transuranics, or on the actinide series of elements, or about the trans-americium elements, or, in general, books or journals on nuclear chemistry.
RE: Curium chemical data help
RE: Curium chemical data help
Rbcoulter is absolutely right. The standard molar enthalpy (heat) of formation at 298.15 K and 1 atmosphere, ΔHfo, for solid elements (if that is their most stable form) is taken as zero by definition. But as a gas, a liquid, an ion or an allotropic form, it would have a non-zero value.
Take as an example, graphite (ΔHfo=0), and diamond (ΔHfo=1.9 kJ/mol, and ΔGfo=2.9 kJ/mol).
The standard molar Gibbs energy of formation at 298.15 K and 1 atm., ΔGfo = ΔHfo- TΔSo = 0.
Where the entropy is measured in J/(K.mol) and has a non-zero value at the standard state.
The Gibbs free energy of formation (a state function) serves us to identify whether a reaction would be spontaneous or not.
ΔGsys < 0 spontaneous process
ΔGsys = 0 reversible (equilibrium) process
ΔGsys > 0 nonspontaneous process
Note that spontaneity doesn't mean speed.
The standard state of the Cm is a solid metal. Density: as above; MP: 1340oC.