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Molecular Physics | Thermodynamics
What is Joule-Thomson effect ? Obtain the
expression for Joule-Thomson coefficient for an Ideal gas.
expression for Joule-Thomson coefficient for an Ideal gas.
Molecular Physics | Thermodynamics
The pressure exerted by an ideal gas is given
by
p = 1/3 mnv²
Using this expression deduce Avogadro's
law.
by
p = 1/3 mnv²
Using this expression deduce Avogadro's
law.
Molecular Physics | Thermodynamics
Define mean free path. Assuming that the
collision probability is a function of distance,
obtain the Survival Equation.
collision probability is a function of distance,
obtain the Survival Equation.
Molecular Physics | Thermodynamics
Discuss the significance of Brownian motion in kinetic theory of gases. Obtain the expression for particle concentration in sedimentation process. The motion of soot particles of radius 0.5 x 10^-4 cm in water-glycerine solution characterized by n= 2.80 x 10^-3 kg m^-1 s^-1 at 300 K was observed
for 10 s. The observed value of ∆(x² ) was
3.30 x 10^-8 cm². Calculate Boltzmann
constant.
for 10 s. The observed value of ∆(x² ) was
3.30 x 10^-8 cm². Calculate Boltzmann
constant.
Molecular Physics | Thermodynamics
Calculate the mean free path of H2
molecules at 300 K. The diameter of H2
molecules is 3 Å and the number density is
3 x 10^25 m^-3
molecules at 300 K. The diameter of H2
molecules is 3 Å and the number density is
3 x 10^25 m^-3
Molecular Physics | Thermodynamics
What is entropy ? Calculate the change in entropy of an ideal gas for an isothermal expansion.
Molecular Physics | Thermodynamics
State the operational ranges and limitations of platinum resistance thermometer and Fe-Constantan thermocouple.
Molecular Physics | Thermodynamics
One mole of oxygen at STP is adiabatically compressed to 5 atm. Calculate the final temperature. Take y = 1.4 and R= 8.31 J mol^-1 K^-1
Molecular Physics | Thermodynamics
A poorly ventilated commercial kitchen contains 120 kg of air at a temperature of 19°C and and with a relative humidity of 30% at the start of the evening shift.
At the end of the shift the temperature in the kitchen is 28°C and water is condensing on the walls and ceilings.
What is the minimum amount of water vapour that has been added to the air in the kitchen over the course of the shift? (to 2 s.f and in kg)
At the end of the shift the temperature in the kitchen is 28°C and water is condensing on the walls and ceilings.
What is the minimum amount of water vapour that has been added to the air in the kitchen over the course of the shift? (to 2 s.f and in kg)
Molecular Physics | Thermodynamics
A physics student takes a 5.0-kg pail of water connected on a rope, and swings it in a vertical circle of radius 90.0 cm at a constant speed of 7.0 m/s.
Figure 1 1.2.1 When the pail passes its highest point, what are the magnitude and direction of its acceleration? [5] 1.2.2 When the pail passes its highest point, what is the tension in the rope? [5] 1.3 One day, the air near Earth’s surface at the Polokwane airport has a uniform density of 1.20 kg/m3, and the absolute pressure at ground level is 99.8 kPa. 1.3.1 What force magnitude does the air pressure produce perpendicular to a horizontally oriented surface of area 1.00 m2 [4] 1.3.2 At increasing elevation above ground level, the pressure (choose from: increases; decreases or does not change) [2] 1.3.3 Calculate the absolute pressure at an elevation of 1.00 km above the Polokwane airport that day.
Figure 1 1.2.1 When the pail passes its highest point, what are the magnitude and direction of its acceleration? [5] 1.2.2 When the pail passes its highest point, what is the tension in the rope? [5] 1.3 One day, the air near Earth’s surface at the Polokwane airport has a uniform density of 1.20 kg/m3, and the absolute pressure at ground level is 99.8 kPa. 1.3.1 What force magnitude does the air pressure produce perpendicular to a horizontally oriented surface of area 1.00 m2 [4] 1.3.2 At increasing elevation above ground level, the pressure (choose from: increases; decreases or does not change) [2] 1.3.3 Calculate the absolute pressure at an elevation of 1.00 km above the Polokwane airport that day.
