Ex. 13: Calculate the number of molecules in one liter of gas at N.T.P., if mass of each molecules is 4.55 x 10 25 kg and its R.M.S. velocity at N.T.P. is 350 m/s. (Atmospheric pressure P = 105 N/m²)
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- The universal gas constant, ? = 8.314 ?/mol.?. In other unit system, ? = 0.08214 ?. atm/ mol.?. Using unit conversion, show how the first value for R can be converted to the second value.Assume you are using the attached pressure gauge and a thermocouple with a temperature uncertainty of +/- 1C; assuming ideal gas how accurately can you report the molar volume n/V=RT/P?A large cylindrical tank contains 0.760 m3 of nitrogen gas at 20.0 ∘C and 1.45×105 Pa (absolute pressure). The tank has a tight-fitting piston that allows the volume to be changed. What will be the pressure if the volume is decreased to 0.410 m3 and the temperature is increased to 159 ∘C? Express your answer in pascals.
- A balloon is filled with helium gas at atmospheric pressure (1 atm) until its volume is 800 m³. The helium gas is then transferred to cylinders that have a volume of 2.3 m³ at a pres- sure of 13.3 atm. Calculate the number of cylinders used. Assume that the temperature of the helium gas remains constant. (1 atm = 1.013 × 105 Pa).25. A movable circular lid rests on top of an a gas-filled a cylinder; the cylinder and lid have a radius of 12.0 cm; the lid has a weight of 800 N. Outside the cylinder is atmospheric pressure, 1.01 x 105 Pa. Inside the cylinder are 6.0 moles of argon gas. The gas temperature is 400 °K. What is the volume of the gas (in cubic meters)? The atomic mass of argon is 39.95. (a) 0.04 (b) 0.21 (c) 0.17 (d) 0.13 (e) none of these osodilo 0 (0) 2 (0) SC on (s)1.68 L of helium gas in a balloon at room temperature (25 °C) was put in an oven at 250 °C and allowed to come to thermal equilibrium with its new surroundings. a) Calculate AU, AH, w and q for the gas inside the balloon.