Molecular Physics | Thermodynamics Answers

steel wire of length 2.5 m and area of 5
cross-section 2-5 x 10 -6M2 is suspended
from a torsion head. A 5 kg weight is
suspended at its free-end.
Calculate the work done on the wire.
Take Y= 2 x 1011 N in 2 .

Two moles of a perfect gas occupy a volume 5
of 0.065 m3 and exert a pressure of
3.0 x 105 N m - 2. It is compressed
isobarically to 0.050 m3. Determine the
work done by the gas and the fall in its
temperature. Take R=8.3 JK - I mol -1.

A gas is suddenly compressed to 10 times 3
its original pressure. Calculate the rise in
temperature of the gas if its initial
temperature is 27°C (-y 1.5).

Calculate the average translational kinetic energy of a nitrogen molecule at 27 degree celcius

an engine working on carnot cycle absorves heat from 3 blocks at 1000 kelvin ,800 kelvin and 600 kelvin.The engine developes 600 kj per min of work and reject 400 kj per min of heat to the block at 300 kelvin.if the heat supplied to the block at 1000 kelvin is 60% of the heat supplied by the block at 600 kelvin.find the quantity of heat absorves by 3 blocks.

An artillery shell is fired at an angle of 26.8◦ above the horizontal ground with an initial speed of 1660 m/s.
Find the total time of flight of the shell, neglecting air resistance.

Write the mathematical form of the first law
of thermodynamics for (i) a thermally
insulated system, and (ii) a perfect gas
expanding into vacuum under isothermal
conditions.

How much boiling water would you need to raise the bath to body temperature (about 37 ∘C)? Assume that no heat is transferred to the surrounding environment.

cp-cv=R? for ideal gas

[1] a square plate of side 10cm is made of a metal of linear expansivity 2\ time 10^{-5}/k.As the plate is heated from 30^{0}c,the area of one face of the plate will increase to.
[2] the choice of thermometer should depend on what properties.
[3]a platinum resistance thermometer has resistance of 52.5 ohms and 9.75 ohms at 0 degrees celsius and 100 degrees celsius respectively. when the resistance is 8.25 ohms,find the temperature.