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Uranium

AP Chemistry learning exercise

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Chemistry
Nuclear technology
Neutron moderators
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Learning exercise

Energy Calculation Problems Problem #1: A cubic block of uranium metal (specific heat = 0.117 J g?1 ?C?1) at 200.0 ?C is dropped into 1.00 L of deuterium oxide of "heavy water" (specific heat = 4.211 J g?1 ?C?1) at 25.5 ?C. The final temperature of the uranium and the deuterium oxide mixture is 28.5 ?C. Given the densities of uranium (19.05 g/cm3) and deuterium oxide (1.11 g/mL) what is the length of the side of the uranium cube? Problem #2: 175.0 g pure H2O was placed in a constant-pressure calorimeter and chilled to 10.0 ?C. 9.80 g pure H2SO4 (also at 10.0 ?C) was added, stirred and the temperature rose to 19.8 ?C. (a) What mass increased in temperature? (b) What was ?t? (c) What was the chemical reaction? (d) What do we assume about the specific heat?
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