Molecular Physics | Thermodynamics Answers

once kg of air expand at a constant temperature from a pressure of 820 kpa and a volume of 3 m³ to a pressure of 220 kpa. determine. a. change of Internal Energy b. change of Enthalpy

one kg of air expand at a constant temperature from a pressure of 820 kpa and a volume of 3 m³ to a pressure of 220 kpa. determine.

A. Change of Internal Energy

B. Change of Enthalpy

Acetylene gas is used in industrial works such as welding metals. The

temperature needed to weld is approximately 2200°C at 1500 psia. Calculate its

density at this given temperature and pressure in kgm per cubic meter

1. How long will a bus take to travel 150 km at an average speed of

40 km/h?

2.

2. A cheetah can run at 30 m/s, but only for about 12 s. How far

will it run in that time?

3. It takes a cheetah just 3 s to reach its top speed of 30 m/s.

What is its acceleration?

For nitrogen the molar volume at STP is 0.224 and the relative molecular mass is 28.calculate the mass of on mole of nitrogen

Which is a more precise measuring tool : ruler or Vernier Caliper? Why?

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