5 Steps to a 5 AP Chemistry
C—Using Dalton’s law (PTotal=PA+PB+.. .), the partial pressure may be found by: 756 mm Hg −41 mm Hg =715 mm Hg. A—The answer ma ...
Free-Response Questions First Free-Response Question You have 20 minutes to do the following question. You may use a calculato ...
Give yourself 1 point for the correct equation, or for any other correct calculation. Do not give yourself more than 2 points to ...
S(s) +O 2 (g)→ SO 2 (g) 2 S(s) +3 O 2 (g) →2 SO 3 (g) If you chose the first equation, the moles of gas produced would be: (1 mo ...
Gas stoichiometry—Know how to apply the gas laws to reaction stoichiometry problems. Non-ideal gases—Know how the van der Wa ...
123 Thermodynamics IN THIS CHAPTER: Summary:Thermodynamicsis the study of heat and its transformations. Thermochemistryis the ...
ΔH°=ΣΔHf°products −ΣΔHf°reactants ΔG°=ΣΔGf°products −ΣΔGf°reactants ΔG° = ΔH°−TΔS° =−RTInK=−2.303RTlogK =−n F E° ΔG=ΔG°+RTlnQ=ΔG ...
Substituting the mathematical relationship for q gives: −(csolid×msolid×ΔTsolid) =cwater×mwater×ΔTwater This equation can then b ...
This is not molar (yet) Thus: Laws of Thermodynamics The First Law of Thermodynamicsstates that the total energy of the universe ...
If the reaction above for the formation of water were reversed, the sign of ΔHwould be reversed. That would indicate that it wou ...
TIP In using this equation be sure to consider the number of moles of each, because ΔHf° for the individual compounds refer to t ...
c. CaSO 4 H 2 OCO 2 CaCO 3 H 2 SO 4 [107 + 188.7 + 213.6] − [92.9 + 157] J/mol K =259 J/mol K. One of the goals of chemists is t ...
[−750.2 +(−237.2) +2(−16.6)] −[2(−203.9) +(−604.2)] =−8.6 kJ/mole b. C 2 H 5 OH(l) C 2 H 4 (g) H 2 O(g) −174.18 68.12 −228.6 −17 ...
Note: °=298 K Answer: Experimental The most common thermodynamic experiment is a calorimetry experiment such as exper- iment 13 ...
Choose the type of energy that best relates to questions 1–4. (A) free energy (B) lattice energy (C) kinetic energy (D) activati ...
9.Under standard conditions calcium metal reacts readily with chlorine gas. What conclusions may be drawn from this fact? (A) Ke ...
D—You may wish to review the Kinetics chapter if you have forgotten what the activation energy is. A—The free energy is the min ...
a. Is the value of ΔS°, for the above reaction, positive or negative? Justify your conclusion. b. The above reaction is spontane ...
The common units of energy are the joule, J, and the calorie, cal. A calorimeter is used to measure the heat released or abs ...
137 Spectroscopy, Light, and Electrons IN THIS CHAPTER Summary:In developing the model of the atom it was thought initially th ...
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