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80                                                   Essentials of Physical Chemistry

            (10) 3. Calculate the laminar bulk flow rate in gallons=min for blood with h ¼ 0:014 poise through
                  an aorta 4 in. long and 1=4 in. inner diameter due to a pressure difference of 130–70 mmHg,
                  and a pulse duty cycle of 0.10.                     (Ans. 3.558 gallons=min)
            (15) 4. The vapor pressure of ethanol is 135.3 mmHg at 408C and 542.5 mmHg at 708C. Calculate
                  DH vap and the boiling point of ethanol at 760 mmHg.
                                                           (Ans. DH vap ¼ 9883:7 cal=mol,78:1 C)

                                         2
                                    2
            (10) 5. Given a ¼ 3.610 atm L =mol and b ¼ 0.0429 L=mol for the van der Waals equation of CO 2 ,
                  calculate the pressure (P) of 3 mol of CO 2 in a 5 L container at 508C.  (15.03137 atm)
            (15) 6. A 0.500 g sample of n-heptane (C 7 H 16 ) burned in a constant volume calorimeter causes

                  DT ¼ 2:934 C.If C V of the calorimeter is 1954 cal=8C and T ave ¼ 258C, calculate DH comb
                  of n-heptane at 2988K.                      (Ans. DH comb ¼ 1151:3 kcal=mol)
            (15) 7. Using the value of DH  0  ¼þ17:06 kcal and DG 0  ¼þ9:72 kcal for the reaction
                                       298                    298
                  2NOCl (g)  ƒ 2NO (g) þ Cl 2(g) , determine the temperature at which K P ¼ 0.600, assuming
                          ƒ!
                  DH and DG remain constant.                               (Ans. T ¼ 665.58K)
            (10) 8. Given DH vap (H 2 O) ¼ 40:71 kJ=mol, calculate DS vap at 1008C.  (Ans. DS vap ¼ 109:1 J= K)

            REFERENCES

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