# physical

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. ### What are the chemical and physical properties of Vegetable oil (preferably canola oil

I am doing some simulations as part of my project in ANSYS CFD and I need to input chemical properties like STANDARD STATE ENTHALPY and MOLECULAR WEIGHT of vegetable oil. Can anyone help me with those values? Thanks in advance.
5. ### Physical chemistry problem

The composition of vapour over a binary ideal solution is determined by the composition of the liquid. If Xa and Ya are the mole fraction of A in the liquid and the vapour respectively, find the value of Xa for which Ya-Xa has a maximum. What is the value of the pressure at this composition in...
6. ### Physical chemistry

Consider the following equilibria at temperature 'T' in Kelvin. 2A(g) ⇌ B(g) 2A(g) ⇌ C(g)+D(g) After the system reaches equilibrium ,it has been found that 20% of initial amount of A has been converted to C and D ,and that 20% of initial amount of A remains. Caculate ,seperately, the number of...
7. ### Physical Chemistry problem help

I dont know wheather this problem is undergraduate level or no but here goes: Consider the following equilibria at temperature 'T' in Kelvin. 2A(g) ⇌ B(g) 2A(g) ⇌ C(g)+D(g) After the system reaches equilibrium ,it has been found that 20% of initial amount of A has been converted to C and D ,and...
8. ### physical chemistry

vapour pressure of water at 293 k is 17.535mmHg. calculate the vapour pressure of water at 293 k when 25 G Of glucose is dissolved in 450g of water.... Help me out please
9. ### Physical Chemistry Help - Molar Heat Capacity

A aluminium bar has a mass of 60 grams and a molar heat capacity , Cm,p of 24.3 JK-1mol-1 is heated to a temperature of 75 degrees Celsius, and dropped into a bath of water at 15 degrees Celsius. The final temperature of the aluminium bar and bath of water is 20 degrees Celsius. Given that the...
10. ### Physical Chemistry- Units and Dimensions

Hi everyone, I just recently started a basic module of physical chemistry in school and I am having a hard time with this one question. Could you please help me? ^^ Question: An orifice meter is used to measure the rate of fluid in pipes. The flow rate is related to the pressure drop by the...
11. ### Physical Chemistry help

Ive been given this question and finding it really difficult hopeful someone may be able to help me. Question: In cosmology, chaotic inflation theory predicts the existance of a series of 'bubble universes', each of which operates a unique set of physical constants. One such bubble universe...
12. ### physical chemistry

i work for a mining company that adsorbs gold using activated charcoal.may you please help me devise laboratory experiments that helps me obtain the highest efficiencies of adsorption, and the best parameters for use.
13. ### Chemical and Physical Changes - MgSO4 and water

Hey, If someone could please help in explaining the reaction if any that takes place when MgSO4 is added to water I would appreciate it. I know for example that adding sugar to water shows a physical change only because the chemical structure stays the same in sugar. I also know that adding...
14. ### Chemistry- Physical Properties

A test tube containing a mixture of compounds X, Y, and a small amount of Z weighs 25.4886 g. The tube is emptied into a beaker and the empty tube is reweighed, giving a value of 10.2586 g. The mixture is separated into two components by dissolving in water, filtering off the insoluble material...