PHYS 1750: SELECTED TOPICS in PHYSICS
LECTURE 22. Heat And Heat Transfer.
| 13.1. | Heat: Energy Required to Raise Temperature | ||
| 13.2. | Specific Heat | ||
| 1. | c = Q/mΔT, or Q = mcΔT, or ΔT = Q/mc | ||
|
c: coefficient of Specific Heat, Q: heat energy input (Joules), m: mass of material heated, ΔT: temperature change. | |||
| 2. | A property of material | ||
| 13.3. | Phase Change and Latent Heat | ||
| 1. | Phase changes | ||
| a. | Particle nature | ||
| b. | Requires/liberates energy | ||
| 2. | Q = mL | ||
| 3. | L-fusion/melting and L-condensation/vaporization | ||
| 13.4 | Transfer Mechanisms | ||
| 13.5 | Conduction: Qtranferred = Δt κ A ΔT / Δs | ||
| 13.6 | Convection | ||
| 13.7 | Radiation: Qtranferred = Δt σ eA Δ(T 4) | ||
| σ = 5.67x10-8 J s-1 m-2 øK-4 | |||
| Global warming | |||