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Chapter 14: Q13Q (page 390)

If you hear that an object has “high heat content,” does that mean that its temperature is high? Explain.

Short Answer

Expert verified

No, the object that has high heat content does not need to have a high temperature.

Step by step solution

01

Relationship between specific heat and heat energy

The relationship between the specific heat and heat energy of a substance is linear. Thus, for a higher value of the heat energy, the value of the specific heat of the substance is also higher.

02

Step 2:Explanation for why an object that has high heat content does not have a high temperature

Suppose two samples of different substances have equal masses and temperatures. Now, a certain amount of heat energy is given to both of them. It increases the temperature of both the samples but the sample having larger specific heat has a lower final temperature. However, the heat content is the same for both substances related to their initial state.

Thus, it is possible that an object composed of a material with very large specific heat has high heat content but not at a high temperature.

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Most popular questions from this chapter

When you put an ice cube in a glass of warm tea, which of the following happens?

(a) Cold flows from the ice cube into the tea.

(b) Cold flows from the ice cube into the tea and heat flows from the tea into the ice cube.

(c) Heat flows from the tea into the ice cube.

(d) Neither heat nor cold flows. Only temperature flows between the ice and the tea.

(a) If two objects of different temperatures are placed in contact, will heat naturally flow from the object with higher internal energy to the object with lower internal energy? (b) Is it possible for heat to flow even if the internal energies of the two objects are the same? Explain.

(II)A 215-g sample of a substance is heated to 330°C and then plunged into a 105-g aluminum calorimeter cup containing 185 g of water and a 17-g glass thermometer at 10.5°C. The final temperature is 35.0°C. What is the specific heat of the substance? (Assume no water boils away.)

(II)The 1.20-kg head of a hammer has a speed of 7.5 m/s just before it strikes a nail (Fig. 14–17) and is brought to rest. Estimate the temperature rise of a 14-g iron nail generated by eight such hammer blows done in quick succession. Assume the nail absorbs all the energy.

(II)A 2.3-kg lead ball is placed in a 2.5-L insulated pail of water initially at 20.0°C. If the final temperature of the water–lead combination is 32.0°C, what was the initial temperature of the lead ball?
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