The heating of solar homos is based on the use of \"solar heat collectors\". The
ID: 1057161 • Letter: T
Question
The heating of solar homos is based on the use of "solar heat collectors". The collector acts as receives and stores heat during the day and use it at night. The material used must be readily available, inexpensive, easy to handle, and take up little space in the house. Should the collector have a specific heat capacity of high, low, or both? Explain your answer. Granite, a common rock, can be used for heat storage. When heated granite is added to 500.0 ml of water, initially 24.0 degree C. the temperature rises to 29.0 degree C. How much energy is absorbed by the 500 mL of water? Is the heat positive or negative? The answer from part b is the amount of energy released by granite. If 174.1 g of granite is used and the temperature of the granite went from 104.0 degree C to 29.0 degree C. what is the specific heat of granite? Two substances. A and B. initially at different temperatures come Into contact and reach equilibrium. The mass of substance A is 6.15 g and its initial temperature is 20.5 degree C. The mass of substance B is 25.2 g and its initial temperature is 52.7 degree C. The final temperature of both substances at thermal equilibrium is 46.7 degree C. If the specific heat capacity of substance B is 1.17 J/g degree C, what is the specific heat capacity of substance A?Explanation / Answer
4. For the material,
a. the specific heat capacity should be so so it can store and transfer maximum heat.
b. amount of heat absorbed = mCpdT
= 500 x 4.184 x (29-24)
= 8368 J
c. specifc heat of granite Cp = heat/mdT
= 8368/174.1 x (29-104)
= 0.641 J/g.oC
5.
substance A : 6.15 g, 20.5 oC initial temperature
substance B : 25.2 g, 52.7 oC initial temperature, Cp = 1.17 J/g.oC
final temperature = 46.7 oC
Heat lost by substance B = heat gained by substance A
6.15 x Cp x (46.7 - 20.5) = 25.2 x 1.17 x (52.7 - 46.7)
Specific heat of substnace A = Cp = 176.904/161.13
= 1.10 J/g.oC
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.