# equilibria

1. ### 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. ### 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. ### 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. ### Chemical Equilibria

Hi. I need help with this question please. 0.500 moles of H2(g) and 0.500 moles of I2(g) are placed in a reaction vessel of volume 1.00 dm3 at 400 degrees Celcius. H2(g) + I2(g) <-----> 2HI(g) Calculate the concentration of H2, I2 and HI at equilibrium if the value of Kc at...
5. ### Chemical equilibria question PLS HELP

Iodine is sparingly soluble in water but much more so in carbon tetrachloride (CCl4). The equilibrium constant, also called the partition coefficent, for the distribution of I2 between these two phases I2 (aq) ⇋ I2 (CCl4) is 83 at 20°C. A student adds 0.030 L of CCl4 to 0.200 L of an aqueous...
6. ### Titration and equilibria?

A mixture of 0.5 moles of ethanoic acid and 1.0 moles of ethanol was shaken for a long time to reach equilibrium. The whole mixture was titrated quickly with 1.00 mol dm^3 sodium hydroxide and 80cm^3 of alkali were required. (i) Write an equation for the reaction between ethanoic and ethanol...
7. ### Equilibria and Mass Balance

Hi guys, I've been struggling with a fairly challenging (for me!) chemistry problem for about a week and a half now. I was hoping someone might be able to help me. Please let me know I what need to clarify, I am paraphrasing the problem here. I will try to state it as simply as I can without...
8. ### Solubility equilibria with nonpolar

Hi, I know how to calculate Ksp for polar solvents and solutes. But what about nonpolar solvents and salutes Many people say it's not possible to calculate that, is that true?? Hope not... Thanks in advance.