Ib Physics Chapter 3 Notes

Topics: Thermodynamics, Temperature, Energy Pages: 3 (971 words) Published: November 25, 2012
I did not understand how to explain why temperature does not change during a phase change and am not entirely sure if I have accurately or thoroughly described 3.2.3 and 3.2.4. This is also the case for 3.2.12

Thermal Physics

Thermal Concepts:

Temperature (T) is a measure of how hot or cold an object is, and it is the temperature that determines the determines the direction of thermal energy transfer between two objects. It is a scalar quantity and is measure in degrees celcius (°C ) or kelvin (K). 0 °C is equal to -273K. Kelvin is based on the properties of a gas. Thermal energy is the receiving of energy from a hot body by a cold body when placed next to each other. Internal energy of a substance is the total potential energy and random kinetic energy of the molecules of the substance. It is where molecules in a body gain energy internally and are able to be move faster (increased KE) and move apart (increased PE) from work being acted upon it. Moles:

• A mole of any material contains 6.022×10^23 atoms or molecules. This is also known as Avogadro's constant. • However, all moles don't have the same mass due to the different types of particles which have different mass

Thermal Properties of Matter:

Specific Heat Capacity (C) of a material is the amount of heat required to raise the temperature of 1kg of the material by 1°C. It is measured in J × °C / kg. It is expressed by the equation: c = Q/ mΔT; where m is mass, Q is the quantity of heat and ΔT is the change in temperature. Thermal Capacity (c) of a material is the amount of heat needed to raise the temperature by 1°C. It is measured in J / °C . It is expressed by the equation: C = Q/ ΔT; where Q is the quantity of heat added and ΔT is the amount of increase in temperature of a body. The physical difference between liquids, solids and gaseous phases in terms of molecular structure and particle motion involve atoms having KE and having strong attraction...
Continue Reading

Please join StudyMode to read the full document

You May Also Find These Documents Helpful

  • Physics Ib Chapter 4 Notes Essay
  • Ib Physics Notes Essay
  • Chapter 3 Notes Essay
  • Chapter 3 Apush Notes Essay
  • Econ Chapter 3 Notes Essay
  • Chapter 7 Notes Essay
  • Chapter 3 Cell Structure Notes Essay
  • Physics Research Paper

Become a StudyMode Member

Sign Up - It's Free