The differential for the Internal energy, U, at constant
composition is
?U = −P?V + T?S
(a) What are the natural independent variables of U? [2]
(b) Derive an expression for the change in internal energy at
constant Volume starting with the
above differential for the internal function, U, at constant
composition. [3]
(c) Using the criterion for exact differentials, write the Maxwell
relation that is derived from this
equation. [2]
(d) Based on your answer in part (a), write the total differential
of U in terms of partial
differentials. [2]
(e) By comparison of the above equation (equation at the beginning
of the question) and the total
differential of U written in part (d), obtain appropriate
expressions (partial differentials) for −P
and T.
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Saccharin, an artificial sweetener that is 300 times sweeter than sugar, is composed of 45.9% carbon, 2.73% hydrogen, 26.23% oxygen, 7.65% nitrogen, and 17.49% sulfur. Each packet of Sweet
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The reaction SO2Cl21g2 ¡ SO21g2 Cl21g2 is first
order
in SO2Cl2. Using the following kinetic data, determine the
magnitude and units of the first-order rate constant:
Time Pressure
0 1.000
2500 0.947
5000 0.895
7500 0.848
10000 0.803
k=
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In the laboratory a student combines 49.7 mL of
a 0.133 M magnesium iodide
solution with 28.0 mL of a 0.562
M nickel(II) iodide solution.
What is the final concentration of iodide anion
?
___ M
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Write in brief about the side effects of using (Benzoic Acid) as
preservative.....?
Which additive does convert (Sodium Benzoate) to (Benzene) in human
body?
Explain briefly, Why (Benzoic Acid) cannot be dissolved in water?
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Calculate the enthalpy change for the reaction below given the standard heat of combustion for ammonia, NH3, is -226 kJ/mol. 4NH3 (g) + 5O2(g) --> 4NO(g) + 6H2O(g)
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Predict the bond order in the following: Ca2
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In need of a numbered, styrofoam cup calorimetry laboratory procedure. This experiment will utilize redox chemical process.
Basic materials include:
Styrofoam cups
Digital thermometers
Cardboard
3M HCL, H2SO4, C2H4O2, NAOH, NH4Cl
Mg, Al, Zn, Fe, Cu
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RESONANCE STRUCTURES how do you know which elements has positve charge or negative
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A .435 g sample of a nonvolatile, nonionizable solute with a molar mass of 67.4 g/mol is dissolved in 15.1 g of cyclohexane. Calculate the molar concentration of solute in the solution.
Calculate the boiling point of the solution described.
Calculate the freezing point of the solution described.
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There is a large difference between Ionization potentials of Oxygen and Nitrogen, whereas the Ionization potentials of Phosphorous and Sulfur are very Close - Explain.
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Identify the charge on the transition metal center and the number of valence d electrons it has.
1. [Cu(en)2(H2O)2]I2
2. [Co(NH3)5(NO2)]Cl2
3. [Co(en)2Cl2]Cl-
4. Mo(bipy)(pph3)(CO)3
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How many grams of an acid, HA (FW 90.04, Ka=5.60x10-2) should be mixed with 5.00 g of its conjugate base, A- (FW 176.22) to give a pH of 1.10 when diluted to 200 mL?
In: Chemistry