Molecular Physics | Thermodynamics Answers

A gas is contained in a 3.0L container at a temperature of 25C. The gas exerts a pressure of 16atm on the container. If pressure is kept constant, what is the final volume of the gas if the temperature of the container is increased to 200C?

An auto mobile tire is inflated to be 0398 as decimal plus 32 psig pressure at 50 degree Fahrenheit after being driven the temperature rises to 75 degree Fahrenheit. Assuming that the volume remains constant, the final gauge pressure is?

The density of nitrogen at S.T.P is1.251kgm^-3. calculate the r.m.s. velocity of nitrogen molecules.

Calculate the temperature at which root mean square speed of a gas molecules is double of its speed at 27°C pressure remaining constant

For a certain gas, R = 0.277 kJ/kg-K and k = 1.384. a) What are the value of cp

and cv? b) What mass of this gas will occupy a volume of 0.425 m3 at 517.11

kPaa and 26.7 0C? c) If 31.65 kJ are transferred to this gas at constant

volume, what are the resulting temperature and pressure?

A spherical balloon is 40 ft in diameter and surrounded by air at 60 0F and

29.92 in Hgabs. If the balloon is filled with hydrogen at a temperature of 70

0Fand atmospheric pressure, what total load can it lift? R of hydrogen is

766.54 ft-lbf/lbm-R. (2381 lb)

A 10 ft3 tank contains gas at a pressure of 500 psia, temperature of 85 0F and

a mass of 25 lbm. A part of the gas was discharged and the temperature and

pressure changed to 70 0F and 300 psia, respectively. Heat was applied and

the temperature was back to 85 0F. Find the final mass, volume and pressure

of the gas. (15.43 lbm, 10 ft3, 308.5 psia)

It takes 36 sec for 0.01 moles of He to effuse through a pinhole in an effusion

apparatus. It takes 72 sec for 0.01 moles of another gas to effuse through the

same system. What is the molecular weight of the unknown gas?

A machinist wishes to insert a brass rod with a diameter of 2 mm into a hole with a diameter of 1.995 mm. By how much would the machinist have to lower the temperature (in °C) of the rod to make it fit the hole?

 Two bodies A and B in figure are separated by a spring. Their motion down the incline is resisted by a force P = 800 N . The coefficient of kinetic friction is 0.30 under A and 0.10 under under B. a.) compute the acceleration of block A b.) Compute the acceleration of block B c.) Determine the force in the spring. *