Determine the specific volume of nitrogen at 100 atm/145K. Given for nitrogen

Pc = 3390 kPa, Tc = 126.2 K. Calculate P

Determine the specific volume of nitrogen at 100 atm/145K. Given for nitrogen

Pc = 3390 kPa, Tc = 126.2 K. Calculate P and compare it with the one

obtained by using the van der Waals equation.​

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  1. Answer:

    Predict which of the substances,

    NH3, N2, CH2Cl2, Cl2, CCl4 has

    (i) the smallest van der Waals “a” constant

    (ii) the largest “b” constant.

    3

    (i) Using Van der Waals equation, calculate the temperature of 20.0 mole of helium in a 10.0 litre cylinder at 120 atmosphere pressure.

    [Data – Van der Waals constants for helium: a = 0.0341 L2 at mol-2; b = 0.0237 L mol-1]

    (ii) Compare this value with the temperature calculated from the ideal gas equation.

    4

    A particular reaction in the gas phase has an activation energy of 8.000 kJ mol-1.

    For 1.00 mole of gas, calculate the number of molecules which exceed this activation energy at

    (a) 300 K

    (b) 400 K

    5

    At 250 K, the activation energy for a gas phase reaction was determined to be 6.500 kJ mol-1.

    What percentage of gaseous molecules would be expected to have less than this energy at 250 K?

    6

    For 1.00 mole of a particular gas, the average molecular energy is found to be 1.300 kJ mol-1 at 298 K. Approximately how many molecules have at least five times the average molecular kinetic energy.

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