To determine the melting point of ice, which procedure would best help measure the melting point temperature?(1 point)
Responses
Mix ice with water until equilibrium is reached but some ice remains that is still melting.
Mix ice with water until just before equilibrium is reached but some ice remains that is no longer melting.
Mix ice with water until equilibrium is reached but some ice remains that is no longer melting.
Mix ice with water until just before equilibrium is reached but some ice remains that is still melting.
To determine the melting point of ice, the best procedure would be to mix ice with water until equilibrium is reached, but some ice remains that is still melting.
Explaining why this procedure is the best option:
When a substance undergoes a phase change, such as melting, it absorbs or releases a specific amount of energy called heat of fusion. During this process, the temperature remains constant until all of the substance has completed the phase change.
In the case of ice, when it is mixed with water, the temperature of the mixture will start to rise. As heat is transferred from the surroundings to the ice-water mixture, the ice will gradually melt and absorb heat energy. At a certain point, all the ice will be melted, and the temperature of the mixture will start to rise again.
To determine the melting point of ice accurately, it is essential to observe the temperature when the ice is still melting but is at equilibrium. This means that the ice is absorbing heat energy from the surroundings at the same rate as it is melting. It ensures that the ice is not causing a temperature drop due to the additional heat needed for melting.
If the ice is completely melted and no longer melting, the temperature will continue to rise, but it will no longer represent the melting point accurately. Similarly, if the ice is not completely melted and still actively melting, the temperature may be lower than the true melting point.
Hence, mixing ice with water until equilibrium is reached, but some ice remains that is still melting, would provide the most accurate measurement of the melting point temperature of ice.