Ch. 9Fluid

Mechanicspgs. 317 - 342

Explain the ideal gas law. Explain the relationship among pressure,

volume, and temperature.

Objectives

The measure of the average kinetic energy of the particles in a substance

SI units for temperature are Kelvin (K) and degrees Celsius (°C)

To convert from the Celsius Scale to Kelvin Scale, add 273.15◦ Example:

Room temperature is 20.°C which is 293.15 K

Temperature (T)

Relates volume, pressure, and temperature

Temperature – Kelvin Scale kB = Boltzmann’s Constant = 1.38 x 10-23 J/K

Ideal Gas Law

When the number of gas particles is constant:

Ideal Gas Law

Pure helium gas is contained in a leakproof cylinder containing a moveable piston. The initial volume, pressure, and temperature of the gas are 15 L, 2.0 atm, and 310 K, respectively. If the gas is rapidly compressed to 12 L and the pressure increases to 3.5 atm, find the final temperature of the gas.