Pistons locked in place Valve P= 1.75 atm V 16.8 L T= 300 K P= 2.25 atm V 22.4 L T 450 K Figure P20.15

An ideal gas with y = 1.67 is initially at 2°C in a volume of 8 L at a pressure of 1.00 atm. It is then expanded adiabatically to a volume of 8.5 L. What is the final temperature of the gas? -20°C -23°C 2.5°C -8.9°C 68°C

A student decides to conduct an experiment by using two different flasks and two different gas samples. In flask 1, there exists Neon (Ne) gas, whereas the second flask is filled with nitrogen (N2) gas. If both flasks are kept at 270 K, answer the following questions. (Note: Molar mass of N2 = 28.014 g mol1,molar mass of Neon = 20.1797 g mol, R= 8.31 J. mol1.K1, k=1.38 x 1023 J.K-1, Avogadro's number = 6.02 x 1023 mol1.) a) Find the average kinetic energy of one Neon molecule. b) Calculate the average kinetic energy (translational+rotational) of one nitrogen molecule by including rotational motion in your calculations. c) Find the root-mean-square speed of one neon molecule. V ms1 Check

A welder using a tank of volume 7.60×10−2 m3m3 fills it with oxygen (with a molar mass of 32.0 g/molg/mol) at a gauge pressure of 2.95×105 PaPa and temperature of 36.0 ∘C∘C. The tank has a small leak, and in time some of the oxygen leaks out. On a day when the temperature is 22.9 ∘C∘C, the gauge pressure of the oxygen in the tank is 1.60×105 PaPa. Find the initial mass of oxygen. Express your answer in kilograms.   Find the mass of oxygen that has leaked out. Express your answer in kilograms.

A cylinder of cross sectional area 0.0287 m^2 is filled with an ideal monoatomic gas. A mass of 47.4 kg is placed on top of the piston which is free to move without friction. The piston starts 0.61m above the base of the cylinder. The gas in the piston is initially at a temperature of 454.0 K and the pressure in the lab is 100kPa.How many moles of gas are in the cylinder?

Hydrogen gas is enclosed in a chamber at 200 degrees C and a volume of 0.0250 m3.  Initially, the pressure in the gas is 1.50 x 106 Pa.  The chamber is removed from the heat source and allowed to cool until the pressure in the gas falls to 0.950 x 106 Pa.  What is T2?

Warm air flows through a rectangular, uninsulated heating duct in your cold attic during the winter. The air has a mass flow rate of 0.47 kg/sec, and the heating duct has dimensions of 20.0cm by 28.0cm with a length of L = 9.60m. The inlet temperature of the air is 42.0°C, at a pressure of 1.00 atm. Your cold attic keeps the surface temperature of the duct at a temperature of 8.0°C. Find the heat transfer rate.