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.
Answers
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.