Molecular Physics | Thermodynamics Answers

Write Onne’s equation. Using van der Waals’ equation, obtain an expression of
Boyle temperature (TB) in terms of van der Waals’ constants and hence show that the
Boyle’s temperature is related to critical temperature (TC) through the relation
TB = .3 375TC

Write Mayer’s formula. The molar heat capacities of a gas at constant pressure
and constant volume are 28.8 J mol−1
K−1
and 20.5 J mol−1
K−1
respectively.
Calculate the gas constant.

At what rate (W) is heat lost through a 2.25 m by 1.75 m glass window pane that is 0.500 cm thick when the inside temperature is 24.5 0C and the outside temperature -11.5 0C

A gaseous system expands from volume v1 to v2 under isobaric conditions. Calculate the work done in the process.

iv) Write Mayer’s formula. The molar heat capacities of a gas at constant pressure
and constant volume are 28.8 J mol−1
K−1
and 20.5 J mol−1
K−1
respectively.
Calculate the gas constant

A gas in a close container is heated with 10 joules of energy causing the lid of the container
To rise 2 meters with 3 newton net force what is the total change in energy of the system?

a. The molar heat capacities of a gas at constant pressure
and constant volume are 28.8 J mol−1
K−1
and 20.5 J mol−1
K−1
respectively.
Calculate the gas constant.

Write Mayer’s formula. The molar heat capacities of a gas at constant pressure
and constant volume are 28.8 J mol−1 K−1 and 20.5 J mol−1 K−1 respectively.
Calculate the gas constant.

A gaseous system expands from volume V1 to V2 under isobaric conditions.
Calculate the work done in this process.

Using the Laplace formula, calculate the velocity of sound for air. Given g = 1.4,
r = 1.29 kg m−3 and p = 1.01 × 105 Nm−2.