Concept explainers
(a)
The order of the samples from highest to lowest temperature.
(a)
Answer to Problem 20.1QQ
Explanation of Solution
Given info: The mass of each sample is
The specific heat of iron is
The formula to calculate energy is,
Here,
From equation (1), formula to calculate the change in the temperature is
Form equation (2), the change is temperature is inversely proportional to the specific heat. So larger the specific heat smaller is the change in temperature.
The specific heat of water is highest so the temperature change is the smallest. The specific heat of glass is less than water but greater than water so temperatures change in glass will be more than water but less than iron and the specific heat of iron is least so the temperature change in iron is most.
Conclusion:
Therefore, temperature order is
(b)
The rank of the samples from greatest to least amount of energy.
(b)
Answer to Problem 20.1QQ
Explanation of Solution
Given info: The mass of each sample is
The specific heat of iron is
The formula to calculate energy is,
Here,
Form equation (3), the energy of the sample is directly proportional to the specific heat of the sample as the mass of each sample and temperature change in the samples are same.
The higher is the specific heat higher the energy will be transferred into the sample for the given temperature increase. So the energy of water will be greatest as it has highest specific heat capacity then the energy of the glass as it has second highest specific heat capacity and then the energy will be least in iron as it has specific heat lowest.
Conclusion:
Therefore, the order from greatest to least energy transferred will be
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Chapter 20 Solutions
Physics for Scientists and Engineers (AP Edition)
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