A 2.00-kg block of aluminum at 50.0 °C is dropped into 5.00 kg of water at 20.0 °C. What is the change in entropy during the approach to equilibrium, assuming no heat is exchanged with the environment?
The specific heat of aluminum is 0.22 cal/(g?K).
A)
8.08 J/K
B)
10.1 J/K
C)
3.25 × 10-2 J/K
D)
3.80 × 10-3 J/K
E)
2.41 × 10-3 J/K
A
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Answer the following statement(s) true (T) or false (F)
A long-wavelength photon, because it is larger, carries more total energy than a short-wavelength photon.
A(n) ______________ is a substance composed of two or more elements chemically combined in a definite, fixed proportion by mass
Fill in the blank(s) with correct word
Wien's Law: What is the frequency of the most intense radiation from an object with temperature 100°C? The constant in Wien's law is 0.0029 m ? K. (c = 3.0 × 108 m/s)
A. 2.9 × 10-5 Hz B. 3.9 × 1013 Hz C. 1.0 × 1013 Hz D. 1.0 × 1011 Hz
Suppose you drop a 10 kilogram mass object and a 5 kilogram mass object on the Moon, both from the same height at the same time. What will happen?
a. Both objects will float freely since they are weightless on the Moon.
b. Both objects will hit the ground at the same time.
c. The 10 kilogram object will hit the ground before the 5 kilogram object.
d. The 5 kilogram object will hit the ground before the 10 kilogram object.