I am surprised by the result when I estimate the specific heat of the plasma produced by heavy ion collisions in the LHC: C(plasma) ~= 2e5 J/(g-K) (Details below.) This is ~1e6 times greater than C(lead)=0.13 J/(g-K) (1). Did I make a mistake? If not, can the physics experts who read this explain why the specific heat is so high? (Extra degrees of freedom, ...?) Thanks in advance for your feedback. ________________________________ Estimate of specific heat of a heavy ion plasma at LHC: C = energy added/(mass*change in temperature) Energy added: Energy of a heavy-ion collison at LHC = 1150 TeV (2). Energy = 1150 TeV * 1.6e-7 J/TeV = 1.8e-4 J Mass: I assume plasma is made of 2 lead nuclei which collide. Mass = 2 x 206 nuceons x 1.66e-24 g/nucleon = 6.8e-22 g Temperature: Heavy ion plasma temp at LHC exceeds 100,000 X solar core temp (3). Temp>=1.6e7 K *1e5 = 1.6e12 K C = energy added/(mass*change in temperature) C = 1.7e5 J/(g-K) (1) http://hyperphysics.phy-astr.gsu.edu/hbase/tables/sphtt.html (2) http://cdsweb.cern.ch/record/1165534/files/CERN-Brochure-2009-003-Eng.pdf, p.21. (3) Ibid., p.25.