Exercise: 1. Suppose, you were slow in transferring the hot metal to the water i
ID: 693550 • Letter: E
Question
Exercise: 1. Suppose, you were slow in transferring the hot metal to the water in the beaker. The experimental change in temperature of the hot metal would (be too large, be too small, remain the same). The experimental change in temperature of the water in the cup would (be too large, be too smal, remain the same). The result would be that the calculated specific heat would (be too smal1, be to large, remain the same CIRCLE the correct responses. 2. Using the Rule of Dulong and Petit, calculate the approximate specific heat (J/gc) of platinum (A 195). SHOH HORK ermine the specific : heat of a metal? Explain your answer.Explanation / Answer
Q1
it will be LOWER, since the temperature of the metal initially will drop, since we took time to drop it.
the change in water will be LOWER, since it will not exchange that much heat with the metal, therefore, lower T
therefore, the especific heat of the sample will be lower, since it will not change temperature that much
Cp = Q/(m*dT)
if dT is low, then Cp is larger
Q2
The law:
Cp = 3R/MW
R = ideal gas constant 8.314 J/gmolK
MW = molar mass of sample, 195 g/mol
then
Cp = 3*8.314/195
Cp = 0.12790 J/gC
Q3
Yes, as far as we know the mass, change in temperature and spécific heat of sample, for instance, we could use oil
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