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# 13: Heat and Heat Transfer

• 13.1: Introduction
Heat is a measurable form of energy that can be transferred from one body to another; it is not a substance.
• 13.2: Specific Heat
An object’s heat capacity (symbol C) is defined as the ratio of the amount of heat energy transferred to an object to the resulting increase in temperature of the object.  Heat capacity is an extensive property, so it scales with the size of the system. A sample containing twice the amount of substance as another sample requires the transfer of twice as much heat (Q) to achieve the same change in temperature (ΔT).
• 13.3: Phase Change and Latent Heat
The latent heat is the energy associated with a phase change of a substance.
• 13.4: Methods of Heat Transfer
Assess why particular characteristics are necessary for effective conduction
• 13.5: Global Warming
Greenhouse gases raise the Earth’s equilibrium temperature by absorbing radiation that would otherwise be emitted into space.
• 13.6: Phase Equilbrium
Evaporation is the process of molecules on a liquid’s surface achieving sufficient energy to break free of the liquid and become gas.