Molecular Physics | Thermodynamics Answers

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.

Derive the single particle partition function for an ideal monatomic gas consisting of N identical particles occupying a volume V. Obtain expression for the entropy and pressure of this system.

If the atmospheric pressure is 108.2 kPa and the gage attached to the tank reads 192 mmHg vacuum, find the absolute pressure within the tank.

Ten kilograms of steam at 100

0C is condensed in 500 kg of water

at 40 0C. What is the resulting temperature? (Ans: 51.8 0C

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

Calculate the linear expansivity or brass or length 170m,that assumes new length of 120.05m when heated through the temperature of 100⁰c

Calculate also the area and heated expansivity

A closed tank contains 0.5m of mercury density 13600 kg/m3 , 2m of water of density 1000 kg/m3 and 3m of oil of density 900 kg/m3 and there is an air space above the oil. The gauge pressure at the bottom of the tank is 200 kPa.

(i) Illustrate the stratification of the fluids under gravity with aid of diagram

(ii) Determine the gauge pressure at the top of the tank