1. Determine the ∆Sº using Appendix G for the following reaction. C2H5OH(l) + 3 O2(g) --> 2 CO2(g) + 3 H2O(l) Report your answer to three sig figs. Omit unit labels. Only add a - number is the sign is negative. Adding a + to a positive answer messes up the grading.
2. Which of the following equations will have a negative ∆S?
A. 3 H2(g)+ N2(g)
--> 2 NH3(g)
B. C6H6(l)-->
C6H6(g)
C. NH4OH(s)-->
H2O(l)+ NH3(g)
D. NaCl(s) --> Na+(aq) +
Cl-(aq)
3. When will the ∆Gº be negative for a reaction with a +∆Hº and a +∆Sº ?
A. |
∆Gº will be negative at higher Temperatures. |
|
B. |
∆Gº will always be positive no matter the temperature. |
|
C. |
∆Gº will be negative at lowerTemperatures. |
|
D. |
∆Gº will always be negative no matter the temperature |
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1. Determine the ∆Sº using Appendix G for the following reaction. C2H5OH(l) + 3 O2(g) -->...
1. The 2nd Law of Thermodynamics states that the entropy of the universe ____ 2. Determine the ∆Gº using Appendix G for the following reaction. C2H5OH(l) + 3 O2(g) --> 2 CO2(g) + 3 H2O(l) Report your answer to four sig figs. Omit unit labels. Only add a - number is the sign is negative. Adding a + to a positive answer messes up the grading.
3. When will the ∆Gº be negative for a reaction with a +∆Hº and a +∆Sº ? A. ∆Gº will be negative at higher Temperatures. B. ∆Gº will always be positive no matter the temperature. C. ∆Gº will be negative at lowerTemperatures D. ∆Gº will always be negative no matter the temperature
3. Consider the following unbalanced reaction and determine the ∆Hº for the reaction using Appendix G in the back of your book. [Report the answer to three sig figs and without unit labels. Use +/- signs to indicate if the value is endo- or exothermic.] ___NO2(g) + ___ H2O(g) --> ___HNO3(g) + ____NO(g)
2. Which of the following equations will have a negative ∆S? A. 3 H2(g)+ N2(g) --> 2 NH3(g) B. C6H6(l)--> C6H6(g) C. NH4OH(s)--> H2O(l)+ NH3(g) D. NaCl(s) --> Na+(aq) + Cl-(aq)
3. Consider the following unbalanced reaction and determine the ∆Hº for the reaction using Appendix G in the back of your book. [Report the answer to three sig figs and without unit labels. Use +/- signs to indicate if the value is endo- or exothermic.] ___NO2(g) + ___ H2O(g) --> ___HNO3(g) + ____NO(g) hydrogen H2(g) 0 0 130.7 H(9) 217.97 203.26 114.7 H(aq) 0 0 o -230.0 -157.2 -10.75 OH-(aq) H30+(aq) -285.8 69.91 H20(1) -285.83 -237.1 70.0 -241.82 -228.59 188.8...
5. Balance the following reaction that occurs in base, using the half-reaction method. NO(g) + MnO4-1(aq) ---> NO3-1(aq) + MnO2(s) When this reaction is balanced, there will be (A) OH-1(aq) and (B) H2O(l) in the final balanced equation. (Enter numbers without the plus sign.) 6. 0.122 grams of an unknown triprotic acid was neutralized with 37.2 mL of a 0.125 M NaOH solution. What is the Molar Mass of the unknown acid? Report the answer to three sig figs and...
2. Balance the following reaction that occurs in acid, using the half-reaction method. I-1(aq) + CrO4-1(aq) --> I2(s) + Cr+3(aq) When this reaction is balanced, there will be (A) H+(aq) and (B) H2O(l) in the final balanced equation. (Enter numbers without the plus sign.) 3. Ca(NO3)2(aq) + K2CO3(aq) --> CaCO3(s) + 2 KNO3(aq) 50 mL of 1.000 M Ca(NO3)2 was reacted with excess potassium carbonate. What mass of calcium carbonate will be made? Repeat your answer to two sig figs...
Which of the following reactions is a redox reaction? (A) NH3(g) + H2O(l) NH4OH(aq) (B) 2 H2O(l) → H30* (aq) + OH- (aq) (C) Mg(OH)2(s) Mg* (aq) + 2 OH- (aq) (E) CO(g) + H2O(g) + CO2(g) + H2(g) (E) 3 HCl(aq) + Na3PO4(aq) H3PO4(aq) + 3 NaCl(aq)
- The reaction N2(g) + 3 F2 (g) → 2 NF3 (9), as A Hºis -248.6 kJ mol- and ArSº is -278.7 JK moll. Calculate the temperature at which the eaction will be at equilibrium. Assume A Hº and A Sº are independent of temperature. - Condensation of a gas to a liquid is an example of a process for which (choose one or more): (a) AH, AS, and AG are negative at all temperatures. (b) AH, AS, and AG...
1. For the reaction N2(g) + 3H2(g) → 2NH3(g), if 2.25 L H2 reacts, what volume of NH3 forms if both are at the same temperature and pressure? 2.Given the balanced reaction below: 2 C6H6(g) + 15 O2(g) ⟶ 12 CO2(g) + 6 H2O(g) If 2.45 liters of benzene are consumed in this reaction, how many liters of water can be formed? Benzene is C6H6