2. A balloon of diameter 20.0 cm is filled with helium gas at 30°C at 1.00 atm. a) How many atoms of helium gas fill a balloon having a diameter of 20.0 cm at 30 °C at 1.00 atm? [ans: 1.02 x 10²' helium's atoms] b) Calculate the average kinetic energy of the helium atoms [ans: 6.27x10-2' J]

2. A balloon of diameter 20.0 cm is filled with helium gas at 30°C at 1.00 atm. a) How many atoms of helium gas fill a balloon having a diameter of 20.0 cm at 30 °C at 1.00 atm? [ans: 1.02 x 10²' helium's atoms] b) Calculate the average kinetic energy of the helium atoms [ans: 6.27x10-2' J]

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter16: Temperature And The Kinetic Theory Of Gases

Section: Chapter Questions

Problem 38P

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Concept explainers

Energy transfer

The flow of energy from one region to another region is referred to as energy transfer. Since energy is quantitative; it must be transferred to a body or a material to work or to heat the system.

Molar Specific Heat

Heat capacity is the amount of heat energy absorbed or released by a chemical substance per the change in temperature of that substance. The change in heat is also called enthalpy. The SI unit of heat capacity is Joules per Kelvin, which is (J K-1)

Thermal Properties of Matter

Thermal energy is described as one of the form of heat energy which flows from one body of higher temperature to the other with the lower temperature when these two bodies are placed in contact to each other. Heat is described as the form of energy which is transferred between the two systems or in between the systems and their surrounding by the virtue of difference in temperature. Calorimetry is that branch of science which helps in measuring the changes which are taking place in the heat energy of a given body.

Question

Given R= 8.31 J mol·' K-' mol-', k= 1.38 x10-23 J K', NA = 6.23 x 1023 mol·1
2. A balloon of diameter 20.0 cm is filled with helium gas at 30°C at 1.00 atm.
a) How many atoms of helium gas fill a balloon having a diameter of 20.0 cm at 30 °C
at 1.00 atm? [ans: 1.02 x 1021 helium's atoms]
b) Calculate the average kinetic energy of the helium atoms [ans: 6.27x10-21 J]

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