Molecular Physics | Thermodynamics Answers

An ideal gas is in equilibrium at initial state with temperature
T=137oCT=137oC
, pressure P = 0.75Pa and volume
V=0.75m3V=0.75m3
. If there is a change in state in which the gas undergoes an isothermal process to a final state of equilibrium during which the volume is doubled. Calculate the temperature and pressure of the gas at this final state.

187oC187oC
and
0.19m30.19m3

394oC394oC
and
0.38m30.38m3

187oC187oC
and
0.38m30.38m3

394oC394oC
and
0.19m30.19m3

Which of the following correctly represents the temperature of an ideal gas?

3Rn2Ek3Rn2Ek

2Ek3Rn2Ek3Rn

Ek3REk3R

2EkRn

A certain resistance thermometer at triple point of water has resistance of
152.0Ω152.0Ω
. What is the temperature of the system in degrees Celsius when the resistance of the thermometer is
230.51Ω230.51Ω
?

414.2oC414.2oC

141.0oC141.0oC

253.2oC253.2oC

80.4oC80.4oC

Which of the following is NOT true about conduction as a means of heat transfer?
transfer of heat occurs through sucessive collisions of the atoms or molecules
the average kinetic energy of the atoms or molecules is greater in the hot object than in the cold object
the transfer process requires a material medium for it to take place
there is net translational motion of the atoms or molecules from their mean equilibrium positions

Calculate the change in internal energy of 2kg of water at
90oC90oC
when it is changed to
3.30m33.30m3
of steam at
100oC100oC
. The whole process occurs at atmospheric pressure. The latent heat of vaporization of water is
2.26×106J/kg2.26×106J/kg
.
4.27 MJ
3.43 kJ
45.72 mJ
543.63 J

Calculate how much heat is needed to be supplied to a gas at a pressure of
1.25×105Pa1.25×105Pa
, such that the pressure increases by 25 per cent at constant volume, and the internal energy by 120J.
240J
120J
320J
480J

1kg of fluid is compressed reversibly according to a law pv=0.25. the final volume is1/4 of the initial volume. calculate the work done on the fluid and sketch the process on a p-v diagram

An automobile engine provides 568 Joules of work to push the pistons.
In this process the internal energy changes by -2778 Joules.

Calculate q for the engine. The represents the amount of heat that must be carried away by the cooling system.

when can a gas be describe as a vapour?

A .48kg piece of wood floats on water but is found to sink in alcohol (sg=.79). What is the sg of the wood?