Question

Meat can be classified as fresh (not frozen) even though it is stored at $-1^{\circ} \mathrm{C}$. Why wouldn't meat freeze at this temperature?

   Meat can be classified as fresh (not frozen) even though it is stored at $-1^{\circ} \mathrm{C}$. Why wouldn't meat freeze at this temperature?

Chemistry

Paul Flowers, Klaus… 2nd Edition

Chapter 11, Problem 67

Instant Answer

Solved by Expert Aadit Sharma

09/21/2019

Step 1

The freezing point of pure water is \(0^{\circ} \mathrm{C}\). However, meat is not composed of pure water; it contains various solutes such as salts, proteins, and fats. Show more…

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Meat can be classified as fresh (not frozen) even though it is stored at $-1^{\circ} \mathrm{C}$. Why wouldn't meat freeze at this temperature?

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Key Concepts

Freezing Point Depression

This is a phenomenon where the freezing point of a liquid is lowered when solutes are dissolved in it. In the context of meat, the natural presence of dissolved salts, proteins, and other substances disrupts the orderly formation of ice crystals, causing the meat to remain in a fresh, unfrozen state even at temperatures slightly below 0°C.

Colligative Properties

These properties depend on the concentration of solute particles in a solvent rather than their specific nature. The lowering of the freezing point in meat is a colligative effect, meaning that the mere presence of solutes interferes with ice crystal formation, which is why meat stored at -1°C does not freeze.

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