Energy transfer
The flow of energy from one region to another region is referred to as energy transfer. Since energy is quantitative; it must be transferred to a body or a material to work or to heat the system.
Molar Specific Heat
Heat capacity is the amount of heat energy absorbed or released by a chemical substance per the change in temperature of that substance. The change in heat is also called enthalpy. The SI unit of heat capacity is Joules per Kelvin, which is (J K-1)
Thermal Properties of Matter
Thermal energy is described as one of the form of heat energy which flows from one body of higher temperature to the other with the lower temperature when these two bodies are placed in contact to each other. Heat is described as the form of energy which is transferred between the two systems or in between the systems and their surrounding by the virtue of difference in temperature. Calorimetry is that branch of science which helps in measuring the changes which are taking place in the heat energy of a given body.
![Table 4
Specific Heat Capacities
Substance
Cp (J/kg•°C)
Substance
Cp (J/kg•°C)
aluminum
8.99 x 102
lead
1.28 x 102
copper
3.87 x 102
mercury
1.38 x 102
glass
8.37 x 102
silver
2.34 x 102
gold
1.29 x 102
2.01 x 103
steam
ice
2.09 x 103
4.186 x 10'
water
iron
4.48 x 102](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F459199ab-2df9-4765-a1cf-e934b11b27e9%2F7cca26f6-1bd1-41e3-8259-578a65b08b27%2Fq4cmg9f_processed.png&w=3840&q=75)
![PRACTICE С
Calorimetry
1. What is the final temperature when a 3.0 kg gold bar at 99°C is dropped
into 0.22 kg of water at 25°C?
2. A 0.225 kg sample of tin initially at 97.5°C is dropped into 0.115 kg of
water. The initial temperature of the water is 10.0°C. If the specific heat
capacity of tin is 230 J/kg•°C, what is the final equilibrium temperature of
the tin-water mixture?
3. Brass is an alloy made from copper and zinc. A 0.59 kg brass sample at
98.0°C is dropped into 2.80 kg of water at 5.0°C. If the equilibrium tem-
perature is 6.8°C, what is the specific heat capacity of brass?
4. A hot, just-minted copper coin is placed in 101 g of water to cool. The
water temperature changes by 8.39°C, and the temperature of the coin
changes by 68.0°C. What is the mass of the coin?](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F459199ab-2df9-4765-a1cf-e934b11b27e9%2F7cca26f6-1bd1-41e3-8259-578a65b08b27%2F1nuggca_processed.png&w=3840&q=75)
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