Molecular Physics | Thermodynamics Answers

The phase difference between two points on a progressive wave is 3𝜋/4

. What will be the

corresponding path difference?

. A compressed spring above the piston exerts a force of 60 N on the piston. If the atmospheric pressure is 95 kpa, determine the pressure inside the cylinder.

Two systems have thermodynamic probabilities of 3.0×10^27 and 1.8×10^28 respectively. Calculate the entropies of the individual systems and as well as their composite system and verify the boltzmann relation.

Four particle are to be distributed in 5 states. Calculate the number of ways in which this distribution can be done if the particles obey:

1) M-B statistics 2)B-E statistics.

1 kg of nitrogen (molar mass 28 kg/kmol) is compressed reversibly and isothermally from 1.01 bar , 20℃ to 4.2 bar. Calculate the work done and the heat flow during the process. Assume nitrogen to be a perfect gas.

A perfect gas has a molar mass of 26 kg/kmol and a value of 𝛾 = 1.26. Calculate the heat rejected when unit mass of the gas is contained in a rigid vessel at 3 bar and 315℃, and is then cooled until the pressure falls to 1.5 bar. Assuming that 𝐶𝑣 = 1.229 𝑘𝐽/𝑘𝑔𝐾 and 𝐶𝑝 = 1.548 𝑘𝐽/𝑘𝑔𝐾. 

A copper cylinder has a radius of 2.5 cm and a length of 5.6 cm at 20 degree Celsius. The rod is heated until its temperature is 85 degree Celsius. Find the density of the copper at 85 degree Celsius. If the density of the copper at 20 degree Celsius is 8,960 kg/m^3

How much energy is needed to melt a 100-g sample of aluminum whose initial temperature is 20 degrees celcius.

How much heat energy or heat is required to change a 45 g ice cube at -120C into steam at 1120C.

Show that 1.0 mol of ideal gas under STP (standard temperature of exactly 0 oC and pressure of exactly 1.0

atm or 101.3 kPa) occupies a volume of 22.4 L.