Ünite 3: (3) Density, Specific Gravity — Hızlı Bakış
Sınavdan hemen önce göz gezdirmek için sıkıştırılmış özet.
Sınavda Dikkat Et
Exam questions frequently test the distinction between solid density, apparent density, and bulk density—pay close attention to whether internal pores and inter-particle air spaces are included.
Remember the volumetric anomaly of water: pure water reaches its maximum density of exactly 1000 kg/m3 at 4°C, not at 0°C.
Memorize specialized hydrometer names and their specific applications, such as lactometers for milk, oleometers for oils, and Brix saccharometers for sucrose solutions.
Note that specific gravity is dimensionless and changes less with temperature than absolute density, and be prepared to use the conversion formula ρL = (SG)T × ρw.
Review the Choi and Okos (1986) empirical temperature-dependent density models for major food components as they often appear in calculation-based exam items.
Understand that adding solid solutes to water generally increases density, whereas thermal heating decreases the density of both liquids and oils due to thermal expansion.
