7. A hot piece of copper (heat capacity 0.385 J/g\'C) is submerged capacity = 2.

Question

7. A hot piece of copper (heat capacity 0.385 J/g'C) is submerged capacity = 2.42 J/g°C). After a few minutes, the temperature equalizes (Tf) and is foun 32.0°C. The copper was originally 70.0°C and the ethanol was of the copper? in 200 g of ethanol (heat d to be initially 30.0°C. What is the mass TABLE 64 Specific Heat Capacities of Some Cor Substances Specific Hea Substance CJ Elements 0.1 Lead Gold Silver 8. You are looking at purchasing cookware and are debating between copper a adjustments on your stovetop? In other words, if you were to place pans of equal mass on the same cooktop with the same heat setting, which would experience the greater temperature increase? Note that this says nothing about how quickly the pans will heat. Consider the table at right. Copper Iron nd aluminum pans. Which will be more sensitive to heat Aluminum Compounds Ethanol Water Materials Glass (Pyrex) Granite Sand Copper Aluminum a. b. At 298 K c. They will experience equal temp change

Explanation / Answer

Ans 7 : The heat lost by copper will be equal to the heat gained by ethanol

Heat = m. c . delta T

where m is mass of substance in grams

c is the specific heat capacity

delta T is change in temperature

So here , putting all the values we get :

m x 0.385 x (70.0 - 32.0) = 200 x 2.42 x (32.0 - 30.0)

m = 66.2 grams

So the mass of copper will be 66.2 grams.

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