The heat of fusion for lead at 327
is 22.9 kJ/kg and the specific heat of solid lead is 0.130 kJ/kg 
the specific of liquid lead is 0.0900 kJ/kg ?C, and the heat of vaporization of lead at 1,620
is 871 kJ/kg. What is the energy needed to vaporize 100 grams of lead starting at 0
?
A. 105 kJ
B. 189 kJ
C. 176 kJ
D. 156 kJ
E. 147 kJ
A. 105 kJ
You might also like to view...
Ohm's Law: For the graph shown in the figure, what physical quantity does the slope of the graph represent for ohmic material?
A. power B. resistivity C. 1/(resistivity) D. resistance E. 1/(resistance)
The following objects are found in a spiral arm of a galaxy. Which is the exception?
a. population II stars b. OB associations c. emission nebulae d. population I stars e. clouds of gas and dust
The event horizon of a black hole is the point where _____
a. the mass of the black hole is concentrated in a singularity b. the accretion disk around the black hole contacts its surface c. the escape velocity equals the speed of light d. tidal forces ionize infalling gas e. an infalling particle reaches equilibrium with radiation pressure
Relative to the focal length of a wide-angle camera lens, the focal length of a telephoto lens is
A) shorter. B) the same. C) longer. D) Any of theses choices could be correct, depending on the camera.