Specific Heat Calculations
27.6
5.0 g of copper was heated from 20°C to 80°C. How much energy (in cal) was used to heat Cu? (Specific heat capacity of Cu is 0.092 cal/g °C)
0.24
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 (cal/g·°C)?
428
A 4.50 g coin of copper absorbed 54 calories of heat. What was the final temperature (in Kelvin) of the copper if the initial temperature was 25°C? Kelvin = degrees C + 273
2902.5
How much energy is absorbed in joules as 100 g of gold is heated from 25 degrees Celsius to 250 degrees Celsius?
4950
How much energy is absorbed in joules as 100 g of iron is heated from 15 degrees Celsius to 125 degrees Celsius?
-3850
How much energy is lost in joules as 100 g of copper cools from 125 degrees Celsius to 25 degrees Celsius?
38
How much heat is absorbed (in cal) 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)
3.9 x 10^4
How much heat must be absorbed in joules by 375 grams of water to raise its temperature by 25° C?
0.18
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 (cal/g·°C)
44
What is the final temperature in Celsius when 625 grams of water at 75.0° C loses 7.96 x 10^4 J?
2130, endothermic
What is the heat transfer in cal when 30 g of water at 25°C changes to 96°C? Is this endo or exothermic?
2130, exothermic
What is the heat transfer in cal when 30 g of water at 96°C changes to 25°C? Is this endo or exothermic?
0.96
What is the specific heat of an unknown substance (in cal/g·°C) if a 2.50 g sample releases 12 calories as its temperature changes from 25°C to 20°C?
-186
What is the temperature change in Celsius of 750 g of gold as it loses 18,000 J of energy?
34.1
What is the temperature change in degrees Celsius of 750 g of iron as it absorbs 11,500 J of energy?
195.6
What mass of tin (in grams) would increase in temperature by 12 degrees Celsius after absorbing 500 J of energy?
.6722
What mass of water (in kg) would increase in temperature by 8 degrees Celsius after absorbing 22,500 J of energy?
27.0
What mass of water in grams can be heated from 25.0° C to 50.0° C by the addition of 2825 J?
498.6
What mass of zinc, in grams, would increase in temperature by 18 degrees Celsius after absorbing 3,500 J of energy?
0.185
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 (cal/g·°C)?
212
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 in grams?