Heat Problems

Specific Heat Problems
1.   5.0 g of copper was heated from 20°C to 80°C. How much energy was used to heat Cu? (Specific heat capacity of Cu is 0.092 cal/g °C)

2.   How much heat is absorbed by 20g granite boulder as energy from the sun causes its temperature to change from 10°C to 29°C? (Specific heat capacity of granite is 0.1 cal/gºC)

3.   How much heat is released when 30 g of water at 96°C cools to 25°C? The specific heat of water is 1 cal/g°C.

4.   If a 3.1g ring is heated using 10.0 calories, its temperature rises 17.9°C. Calculate the specific heat capacity of the ring. 

5.   The temperature of a sample of water increases from 20°C to 46.6°C as it absorbs 5650 calories of heat. What is the mass of the sample? (Specific heat of water is 1.0 cal/g °C)

6.   The temperature of a sample of iron with a mass of 10.0 g changed from 50.4°C to 25.0°C with the release of 47 calories of heat. What is the specific heat of iron?

7.   A 4.50 g coin of copper absorbed 54 calories of heat. What was the final temperature of the copper if the initial temperature was 25°C? The specific heat of copper is 0.092 cal/g°C.

8.   A 155 g sample of an unknown substance was heated from 25°C to 40°C. In the process, the substance absorbed 569 calories of energy. What is the specific heat of the substance?

9.   What is the specific heat of an unknown substance if a 2.50 g sample releases 12 calories as its temperature changes from 25°C to 20°C?

10. How much heat must be absorbed by 375 grams of water to raise its temperature      by 25° C?
11) What mass of water can be heated from 25.0° C to 50.0° C by the addition of
2825 J?
12) What is the final temperature when 625 grams of water at 75.0° C loses
7.96 x 10^4J?
13) A copper cylinder has a mass of 76.8 g and a specific heat of 0.092 cal/g·C. It
is heated to 86.5° C and then put in 68.7 g of turpentine whose temperature is
19.5° C. The final temperature of the mixture is 31.9° C. What is the specific heat of the turpentine?
14) A 65.0 g piece of iron at 525° C is put into 635 grams of water at 15.0° C What is the final temperature of the water and the iron?
 

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