Which of the following statements is true about a heating curve? 1. It shows what happens to a...

Question:

Which of the following statements is true about a heating curve?

1. It shows what happens to a substance as heat is applied.

2. It is a plot of temperature vs. time.

3. At the plateaus, melting or vaporization is taking place.

4. All of these answers are correct.

The correct answer given is #4. However, I feel #2 and #3 are not accurate. For #2, according to the graph, the heating curve is a plot of temperate vs. heat, not time. For #3, at the plateaus, freezing or condensation is also taking place as well as melting or vaporization. Can you explain why #4 is the correct answer?

Temperature vs. Heat

Many people believe that temperature is a measure of heat. This is not true. Temperature of an object is a measure of the average Kinetic Energy of the particles that make up the object. Kinetic energy is directly connected to the motion of an object so temperature is the average motion of the particles that make up the object. When heat is added to an object it can speed up the motion of the particles, which is increasing Kinetic energy, and in that way temperature could be said to measure heat. The difference is that not all added heat (or removed as well) changes the motion/Kinetic energy of the particles. So temperature is related to measuring heat but not always.

Answer and Explanation:

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  1. 2 - A heating curve graphs the relationship directly between the heat added to an object and the temperature of that object AS TIME PASSES. Time is...

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