physical

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    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. R

    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.
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    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. A

    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...
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    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...
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    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
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    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...
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    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...
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    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. R

    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.
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    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...
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    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...