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Deuterium

Organic Chemistry Lecture 13b

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Chapter 13 * The N + 1 Rule If a signal is split by N equivalent protons, it is split into N + 1 peaks. Chapter 13 Chapter 13 * Equivalent protons do not split each other. Protons bonded to the same carbon will split each other if they are nonequivalent. Protons on adjacent carbons normally will split each other. Protons separated by four or more bonds will not split each other. Spin-spin Splitting Distance Chapter 13 Chapter 13 * Long-Range Coupling When the hydrogen atoms are four bonds or more apart, spin-?spin splitting is not normally observed. When it actually does occur it is called ?long-range coupling.? Chapter 13 * Splitting for Ethyl Groups

AP Chemistry learning exercise

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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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