Molecular Physics | Thermodynamics Answers

An ideal gas is expanding such that PT=constant.The coefficient of volume expansion of the gas is
choices are
a) 1/T
b) 2/T
c) 3/T
d) 4/T

10/ Calculate the change in entropy of gases in the following cases:
a) A 3.0 mol sample of an ideal gas expands reversibly and isothermally at 350 K until its volume doubled.
b) The temperature of 1.0 mol of an ideal monatomic gas is raised reversibly from 200 K to 300 K, with its volume kept constant.

A 2.0 mol sample of an ideal monatomic gas undergoes a reversible process at constant volume, increasing its temperature from 400 K to 600K. What is the entropy change of the gas?

A wooden block ( 20 cm x 20 cm x 20 cm ) has a relative density of 0.9. What weight ( in air) W of a sinker will cause it to be fully submerged?

A 28.45 g metal specimen of gold and 25.75 g metal specimen of iron, each at a temperature of 100.0 °C were dropped into 570.0 mL of water at a temperature of 17.70 °C. The molar heat capacity of iron and gold are 25.19 J mol -1 °C -1 and 25.41 J mol 1 °C -1 respectively. Assume the density of water to be 1.00g/mL, what is the final temperature of the water and pieces of metals?

The maximum amount of mechanical energy that can be converted into heat in any process
(a) is 100%
(b) depends upon the temperature at intake and exhaust
(c) depends upon the amount of friction present
(d) is same for reversible and irreversible process

Air expands from 5 litres to 10 litres at 2 atm pressure. What is the eternal work done?

A father pushes horizontally on his daughter's sled to move it up a snowy incline, as illustrated in the figure, with h = 3.5 m and θ = 10°. The total mass of the sled and the girl is 35 kg and the coefficient of kinetic friction between the sled runners and the snow is 0.20. If the sled moves up the hill with a constant velocity, how much work is done by the father in moving it from the bottom to the top of the hill?

in an experiment involving the spiral spring,f is the residing force and x the extension of the spring. the equation f =-kx gives the relationship between f and x. what does k measure in the experiment?

The predominant mode of heat transfer in solids is a.convection b.conduction c.radiation d.diffusion