PHYS 101 Chapter Notes - Chapter 13: Thermal Expansion, Boiling Point, Molecular Mass

• School: McGill University
• Department: Physics
• Course: PHYS 101
• Professor: Kenneth Ragan

Document Summary

The atomic theory of matter postulates that all matter is made up of tiny entities called atoms, which are typically (cid:883)(cid:882) (cid:2869)(cid:2868) m in diameter. the value (cid:883)(cid:884). (cid:882)(cid:882)(cid:882)(cid:882) (cid:1873) (atomic mass units). Atomic and molecular masses are specified on a scale where ordinary carbon is arbitrarily given. The distinction between solids, liquids, and gases can be attributed to the strength of the attractive forces between the atoms or molecules and to their average speed. Temperature is a measure of how hot or cold something is. Thermometers are used to measure temperature on the celsius ( c), fahrenheit ( f), and kelvin (k) scales. Two standard points on each scale are the freezing point of water and the boiling point of water. A one-kelvin change in temperature equals a change of one celsius degree or 9/5 fahrenheit degrees. Kelvins are related to c by: (cid:4666)(cid:1837)(cid:4667)=(cid:4666) (cid:4667)+(cid:884)(cid:889)(cid:885). (cid:883)(cid:887)