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Which of the following statements about specific heat is true?

A. A substance with high specific heat resists changes in temperature more than a
substance with low specific heat.
B. When objects of the same material have different masses, the specific heat differs
as well.
C. The specific heat of water is unusually low.
D. Different materials must have different specific heats.

1 Answer

3 votes

Final answer:

The correct statement about specific heat is that a substance with high specific heat resists changes in temperature more than a substance with low specific heat. Specific heat is intrinsic to a material and does not depend on mass, and water has a high specific heat, not low.

Step-by-step explanation:

The question revolves around the concept of specific heat, which is the amount of energy required to raise the temperature of 1 gram of a substance by 1°C at constant pressure. Looking at the statements provided and comparing them with the facts, we find that:

  • A substance with high specific heat, like water, does indeed resist changes in temperature more than a substance with a lower specific heat. This is because more energy is required to increase the temperature of a substance with a high specific heat capacity.
  • The specific heat is a characteristic of a material and does not depend on the mass of the object, so the statement about different masses resulting in different specific heats for the same material is incorrect.
  • Water has a very high specific heat compared to most other substances (about 4.2 J/g °C for the liquid and 2.09 J/g °C for the solid), contrary to the statement that suggests water has an unusually low specific heat.
  • All materials do not necessarily have distinct specific heats; similar materials can have similar specific heats.

Therefore, the correct statement about specific heat is A. A substance with high specific heat resists changes in temperature more than a substance with low specific heat.

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