Molecular Physics | Thermodynamics Answers

At a pressure of 405 kPa, the volume of a gas is 6.00 cm3. Assuming the
temperature remains constant, at what pressure will the new volume be 4.00
cm3?

A sample of argon gas is sealed in a container. The volume of the container is doubled. If the
pressure remains constant, what happens to the absolute temperature?

calculate the entropy change for 2 mole of ice.Freezing point of water is 273 k and molar enthalpy for fashion is 6 KJ Mole^-1.

One mole of an ideal gas at standard temprature and pressure occupies 22.4L(molar volume).What is the ratio of molar volume to the atomic volume of a mole of hydrogen? (Take the size of Hydrogen molecule to be about 1 A ( one angstrom).












l

An experimentalist observed the motion of soot particles of radius 0.5 × 10−4 cm in
water-glycerine solution characterised by h = 2.80 × 10−3 kg m−1 s−1 at 300K for 10 s.
The observed value of D x2 was 3.30 × 10−8 cm2. Calculate Boltzmann constant and
hence Avogadro’s number.

One mole of oxygen at STP is adiabatically compressed to 5 atm. Calculate the final
temperature. Also, calculate the work done on the gas. Take g = 1.4 and
R = 8.31 J mol−1 K−1.

Calculate the work done by one mole of a van der Waals’ gas if during its isothermal
expansion its volume increases from 1m3 to 2m3 at a temperature 300K.
Take a = 1.39 × 10−6 atm m6 mol−2 and b = 39.1 × 10−6 m3 mol−1.

a barometer is faulty. when the true barometer reading are 73 and 75 cm of hg the faulty barmeter reads 69 cm and 70 cm respectively .
waht is the total length of barometer tube?

Is it true that as pressure decreases, the temperature will decrease if gas is at a constant volume?

an ideal gas occupies a volume of 1.0 cubic cm at 20 degrees and atmosphere . determine the number of molecules of gas in the container .(b) if the pressure of the 1.0-cm cubic volume is reduced to 1.0*10 to the power negative 11 Pa(an extremely good vacuum )while the temperature remains constant , how many moles of gas remain in the container ?