20. The kinetic molecular model of an ideal gas shows that * average translational kinetic energy of a molecule is inversely proportional to the absolute temperature average translational kinetic energy of a molecule is directly proportional to the absolute temperature average translational kinetic energy of a molecule is not dependent to the absolute temperature average translational kinetic energy of a molecule is equal to the absolute temperature 21. The first law of thermodynamics helps us understand the relationships *1 among which three quantities? Heat, work, and internal energy O Heat, work, and external energy O Heat, work, and entropy O Heat, work, and enthalpy

20. The kinetic molecular model of an ideal gas shows that * average translational kinetic energy of a molecule is inversely proportional to the absolute temperature average translational kinetic energy of a molecule is directly proportional to the absolute temperature average translational kinetic energy of a molecule is not dependent to the absolute temperature average translational kinetic energy of a molecule is equal to the absolute temperature 21. The first law of thermodynamics helps us understand the relationships *1 among which three quantities? Heat, work, and internal energy O Heat, work, and external energy O Heat, work, and entropy O Heat, work, and enthalpy

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter10: Thermal Physics

Section: Chapter Questions

Problem 44P: A sealed cubical container 20.0 cm on a side contains a gas with three times Avogadros number of...

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One mole of an ideal gas is contained in a cylinder with a movable piston. The initial pressure, volume, and temperature are Pi, Vi, and Ti, respectively. Find the work done on the gas in the following processes. In operational terms, describe how to carry out each process and show each process on a PV diagram. (a) an isobaric compression in which the final volume is one-half the initial volume (b) an isothermal compression in which the final pressure is four times the initial pressure (c) an isovolumetric process in which the final pressure is three times the initial pressure
Which one of the following statements is true? (a) The path on a PV diagram always goes from the smaller volume to the larger volume. (b) The path on a PV diagram always goes from the smaller pressure to the larger pressure. (c) The area under the path on a PV diagram is always equal to the work done on a gas. (d) The area under the path on a PV diagram is always equal in magnitude to the work done on a gas.
One mole of neon gas is heated from 300 K to 420 K at constant pressure. Calculate (a) the energy Q transferred to the gas, (b) the change in the internal energy of the gas, and (c) the work done on the gas. Note that neon has a molar specific heat of Cp = 20.79 J/mol K for a constant-pressure process.
Unreasonable Results (a) How many moles per cubic meter of an ideal gas are there at a pressure of 1.001014N/m2 and at 0C ? (b) What is unreasonable about this result? (c) Which premise or assumption is responsible?
Model air as a diatomic ideal gas with M = 28.9 g/mol. A cylinder with a piston contains 1.20 kg of air at 25.0C and 2.00 105 Pa. Energy is transferred by heat into the system as it is permitted to expand, with the pressure rising to 4.00 105 Pa. Throughout the expansion, the relationship between pressure and volume is given by P = CV1/2 where C is a constant. Find (a) the initial volume, (b) the final volume, (c) the final temperature, (d) the work done on the air, and (e) the energy transferred by heat.
You have a particular interest in automobile engines, so you have secured a co-op position at an automobile company while you attend school. Your supervisor is helping you to learn about the operation of an internal combustion engine. She gives you the following assignment, related to a simulation of a new engine she is designing. A gas, beginning at PA = 1.00 atm, VA = 0.500 L, and TA = 27.0C, is compressed from point A on the PV diagram in Figure P19.31 (page 530) to point B. This represents the compression stroke in a fourcycle gasoline engine. At that point, 132 J of energy is delivered to the gas at constant volume, taking the gas to point C. This represents the transformation of potential energy in the gasoline to internal energy when the spark plug fires. Your supervisor tells you that the internal energy of a gas is proportional to temperature (as we shall find in Chapter 20), the internal energy of the gas at point A is 200 J, and she wants to know what the temperature of the gas is at point C. Figure P19.31