phase

  1. S

    Phase equilibria, Physical Chemistry

    The transition Sn(s, gray) ⇌ Sn(s, white) is in equilibrium at 18 °C and 1 atm pressure. If ∆S = 8.8 11K mol for the transition at 18 °C and if the densities are 5.75 g/cm3 for gray tin and 7.28 g/cm3 for white tin, calculate the transi- tion temperature under 100 atm pressure .
  2. S

    Phase equilibria, Physical Chemistry

    At 25°C we have for rhombic sulfur: ΔfG°= 0; S° = 31.88 ± 0.17 J /K/ mol ; and for monoclinic sulfur: ΔfG°=63 J/mol; S°= 32.55 ± 0.25 J/K/mol. Assuming that the entropies do not vary with temperature, sketch the value of 'μ' versus T for the two forms of sulfur. From the data determine the...
  3. S

    Phase equilibria, Physical Chemistry

    At 25°C we have for rhombic sulfur: ΔfG°= 0; S° = 31.88 ± 0.17 J /K/ mol ; and for monoclinic sulfur: ΔfG°=63 J/mol; S°= 32.55 ± 0.25 J/K/mol. Assuming that the entropies do not vary with temperature, sketch the value of 'μ' versus T for the two forms of sulfur. From the data determine the...
  4. U

    inorganic salt phase change materials

    hello new here . i have moved this post from the new user section. hope this is ok. please tell me if it isn't! my question relates to using sodium sulphate as a PCM i am using the decahydrate form at the moment but the anhydous form is a lot cheaper in bulk. is there a way to convert it to the...
  5. U

    salt phase change materials

    hello new here . my question relates to using sodium sulphate as a PCM i am using the decahydrate form at the moment but the anhydous form is a lot cheaper in bulk. is there a way to convert it to the decahydrate form easily? one report says just leave it in the damp air,but can i just add...
  6. R

    Who can read the phase diagram for alloy stuff?I miss data?

    Hi guys sadly I noticed too late that I have noted some unknown numbers here regarding to a uni task and I can't figure what's related to what. BUT who is familiar to alloy phase diagrams can possibly read it easily here is the diagram...