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Q1. Express in terms of P, V, T, CP, CV, and their derivatives. Your answer may include absolute values of S if it is not a derivative constraint or within a derivative.

a. (∂G/∂P)T

b. (∂P/∂A)V

c. (∂T/∂P)S

d. (∂H/∂T)U

e. (∂T/∂H)S

f. (∂A/∂V)P

g. (377/8P)H

h. (∂A/∂S)P

i. (∂S/∂P)G

Q2.

 a. Derive (∂H/∂P)T and (∂U/∂P)T in terms of measurable properties.

b. dH = dU + d(PV) from the definition of H. Apply the expansion rule to show the difference between (∂H/∂P)T and (∂U/∂P)T is the same as the result from part (a).

Q3. Express (∂H/∂V)T in terms of αp and/or κT.

Q4. Determine the difference CP - CV for the following liquids using the data provided near 20°C.

Liquid

MW

ρ(g/cm3)

103αP(K-1)

106κT(bar-1)

(a) Acetone

58.08

0.7899

1.487

111

(b) Ethanol

46.07

0.7893

1.12

100

(c) Benzene

78.12

0.87865

1.237

89

(d) Carbon disulfide

76.14

1.258

1.218

86

(e) Chloroform

119.38

1.4832

1.273

83

(f) Ethyl ether

74.12

0.7138

1.656

188

(g) Mercury

200.6

13.5939

0.18186

3.95

(h) Water

18.02

0.998

0.207

49

Q5. A rigid container is filled with liquid acetone at 20°C and 1 bar. Through heat transfer at constant volume, a pressure of 100 bar is generated. CP = 125 J/mol-K. (Other properties of acetone are given in Q4) Provide your best estimate of the following:

a. The temperature rise

b. ΔS, ΔU, and ΔH

c. The heat transferred per mole

Q6. The Soave-Redlich-Kwong equation is presented in Q7. Derive expressions for the enthalpy and entropy departure functions in terms of this equation of state.

Q7. The Soave-Redlich-Kwong equation is given by:

P = (RTρ/1-bρ) - (aρ2/1+bρ) or Z = (1/1-bρ) - (a/bRT) · (bρ/1+bρ)

where ρ = molar density = n/V 

a ≡ aca;   ac ≡ 0.42748(R2T2c/Pc),                  b ≡ 0.08664(RTc/Pc)

a ≡ [1 + κ(1 - √(Tr))]2            κ ≡ 0.480 + 1.574ω - 0.176ω2                                  

Tc, Pc, and ω are reducing constants according to the principle of corresponding.

Q8. A gas has a constant-pressure ideal-gas heat capacity of 15R. The gas follows the equation of state,

Z = 1 + aP/RT

over the range of interest, where a = -1000 cm3/mole,

a. Show that the enthalpy departure is of the following form:

(H - Hig/RT) = aP/RT

b. Evaluate the enthalpy change for the gas as it undergoes the state change:

T1 = 300 K, P1 = 0.1 MPa, T2 = 400 K, P2= 2 MPa.

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