(28) (a) How many molecules are there in 1 L of air at a temperature of 27 °C? (b) How many kilomoles of air are in that volume? (c) The best vacuum that can be produced corresponds to a pressure of about 10-16 atm. How many molecules remain in 1 L? 11: ith

(28) (a) How many molecules are there in 1 L of air at a temperature of 27 °C? (b) How many kilomoles of air are in that volume? (c) The best vacuum that can be produced corresponds to a pressure of about 10-16 atm. How many molecules remain in 1 L? 11: ith

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter19: Temperature, Thermal Expansion And Gas Laws

Section: Chapter Questions

Problem 39PQ

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Concept explainers

Kinetic Theory of Gas

The Kinetic Theory of gases is a classical model of gases, according to which gases are composed of molecules/particles that are in random motion. While undergoing this random motion, kinetic energy in molecules can assume random velocity across all directions. It also says that the constituent particles/molecules undergo elastic collision, which means that the total kinetic energy remains constant before and after the collision. The average kinetic energy of the particles also determines the pressure of the gas.

P-V Diagram

A P-V diagram is a very important tool of the branch of physics known as thermodynamics, which is used to analyze the working and hence the efficiency of thermodynamic engines. As the name suggests, it is used to measure the changes in pressure (P) and volume (V) corresponding to the thermodynamic system under study. The P-V diagram is used as an indicator diagram to control the given thermodynamic system.

Question

(28) (a) How many molecules are there in 1L of air at a temperature of 27°C?
(b) How many kilomoles of air are in that volume? (c) The best vacuum that
can be produced corresponds to a pressure of about 10-16 atm. How many
molecules remain in 1 L?
(20)
11:

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