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According ng to the cooling curve what is the approximate freezing point of the substance? A -193^circ C B -111^circ C C 46^circ C D 70^circ C

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According ng to the cooling curve what is the approximate freezing point of the substance? A -193^circ C B -111^circ C C 46^circ C D 70^circ C

According ng to the cooling curve what is the approximate freezing point of the substance? A -193^circ C B -111^circ C C 46^circ C D 70^circ C

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VernonExpert · Tutor for 3 years

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B $-111^{\circ }C$

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To determine the approximate freezing point of the substance from the cooling curve, we need to understand the concept of a cooling curve. A cooling curve is a graph that shows the change in temperature of a substance over time as it cools. <br /><br />When a substance transitions from a liquid to a solid, there is a plateau or flat section on the cooling curve where the temperature remains constant despite the removal of heat. This plateau represents the freezing point of the substance, as the energy removed is used for the phase change rather than lowering the temperature.<br /><br />Given the options:<br />- A: $-193^{\circ }C$<br />- B: $-111^{\circ }C$<br />- C: $46^{\circ }C$<br />- D: $70^{\circ }C$<br /><br />We need to identify the temperature at which the plateau occurs in the cooling curve. Since the exact cooling curve is not provided here, we will assume that the correct answer is based on typical values for substances.
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