Temperature, Gases and Thermal Expansion

Name: Temperature, Gases and Thermal Expansion
Author: StemPy Lab

A thermometer reads 37 degrees for a healthy person, and a gas at the same moment has a temperature of 310 kelvin. In this course we separate temperature from heat, we meet the Celsius, Fahrenheit and Kelvin scales, we find the law of the ideal gas and the meaning of absolute zero, and we find how much solids, liquids and gases expand when they are heated, including the strange case of water near 4 degrees.

3 lessons, about 1 h 15 min3 simulations12 problems6 practice questionsPython in every lesson

Created by StemPy Lab

Course outline (3 lessons)

Lesson 1about 25 min
Temperature, heat and the measurement of temperature
Temperature tells which way heat will flow; heat is the energy that flows. Bodies in contact reach thermal equilibrium at one temperature. Thermometers use a property that changes steadily with temperature, fixed at the ice point and the steam point. $T_F = \tfrac95 T_C + 32$ and $T = T_C + 273.15$ .
1 simulation2 practice questions1 Python program4 problems1 question set
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Lesson 2about 25 min
The ideal gas equation and absolute temperature
For a gas at low density, Boyle's law ( $pV$ constant at steady temperature) and Charles's law ( $V \propto T$ at steady pressure) combine into the ideal gas equation, $pV = nRT = Nk_BT$ , with $R = 8.31\ \text{J mol}^{-1}\text{K}^{-1}$ . Every gas's pressure, extended to lower temperatures, reaches zero at the same point: absolute zero, $0\ \text{K} = -273.15\ ^\circ\text{C}$ .
1 simulation2 practice questions1 Python program4 problems1 Python lab
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Lesson 3about 25 min
Thermal expansion
Most things grow when warmed. A length grows by $\Delta L = \alpha L\,\Delta T$ , an area by $2\alpha$ and a volume by $\gamma = 3\alpha$ of itself per kelvin. Bridges and rails need gaps, bimetallic strips bend, and water is odd: it shrinks as it warms from $0\ ^\circ\text{C}$ to $4\ ^\circ\text{C}$ , so ponds freeze from the top.
1 simulation2 practice questions1 Python program4 problems1 Python lab1 note
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Temperature, Gases and Thermal Expansion: Practice Paper

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More onHeat & Thermodynamics › Temperature and Thermal Expansion Heat & Thermodynamics › Kinetic Theory of Gases

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Temperature, Gases and Thermal Expansion

Course outline (3 lessons)

Temperature, heat and the measurement of temperature

The ideal gas equation and absolute temperature

Thermal expansion

Test Your Learning

Your teacher

Discussion (0)