The following are the temperatures of milk in Celsius. In which of the...
The rise in temperature depicts thermal energy. So among the given options at 82 degrees Celsius the milk has the highest thermal energy and at 9 degrees Celsius the milk has higher intermolecular energy. So at 9 degrees, the intermolecular forces are predominant than thermal energy in milk.
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The following are the temperatures of milk in Celsius. In which of the...
Intermolecular Forces vs Thermal Energy
Intermolecular forces play a significant role in determining the physical properties of substances. In the case of milk, which is a complex mixture of proteins, fats, and sugars dissolved in water, intermolecular forces such as hydrogen bonding between water molecules and van der Waals forces between the different components of milk are crucial in maintaining its structure and properties.
Explanation of the correct answer
Option D: 9°C
At a temperature of 9°C, the intermolecular forces are more predominant than thermal energy. This is because at lower temperatures, the kinetic energy of the molecules is reduced, causing them to move more slowly. As a result, the molecules are closer together, leading to stronger intermolecular forces.
In the case of milk, which is primarily composed of water, the hydrogen bonds between water molecules become more significant at lower temperatures. These hydrogen bonds help to hold the structure of the milk together and contribute to its viscosity and texture.
At higher temperatures, such as 35°C, 50°C, or 82°C, the thermal energy becomes more dominant. The increased kinetic energy at higher temperatures causes the molecules to move more rapidly, overcoming the intermolecular forces. This leads to a decrease in viscosity and a change in the physical properties of the milk.
Therefore, at 9°C, the intermolecular forces are more predominant than thermal energy, making it the correct answer in this context.