Exam 02 - Version 033 EXAM 2 Fakhreddine (53605) This...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Version 033 – EXAM 2 – Fakhreddine – (53605) 1 This print-out should have 18 questions. Multiple-choice questions may continue on the next column or page – fnd all choices be±ore answering. 001 12.0 points Consider the reaction CO(g) + 2 H 2 (g) CH 3 OH(g) . At room temperature, K is approximately 2 × 10 4 , but at a higher temperature K is substantially smaller. Which o± the ±ollowing is true? 1. At the higher temperature, more CH 3 OH(g) is produced. 2. The reaction is endothermic. 3. The reaction becomes spontaneous at higher temperatures. 4. The value o± K c ±or this reaction is smaller at all temperatures. 5. The reaction is exothermic. correct Explanation: 002 10.0 points Which o± the ±ollowing anions is the strongest base, according to the Bronsted-Lowry the- ory? 1. NO 3 2. None o± the anions listed is a base. 3. ClO 3 4. Cl 5. F correct 6. I Explanation: HCl, HNO 3 , HI and HClO 3 are strong acids with very weak Bronsted-Lowry bases. HF is a weak acid and an appreciable amount o± it remains in solution as the unionized acid. 003 10.0 points Consider the equilibrium 4 NH 3 (g) + 5 O 2 (g) 4 NO(g) + 6 H 2 O(g) What happens to the partial pressure o± NH 3 when the partial pressure o± NO is in- creased? 1. Unable to determine 2. remains the same 3. decreases 4. increases correct Explanation: I± the pressure o± NO (a product) is in- creased, the reaction will shi±t to ±orm more reactants; the pressure o± NH 3 should in- crease. 004 12.0 points Consider the reaction 2 SO 2 (g) + O 2 (g) 2 SO 3 (g) where Δ H rxn = - 198 kJ. The amount o± SO 2 (g) at equilibrium increases when 1. the volume is increased. correct 2. SO 3 is removed. 3. the temperature is decreased. 4. more oxygen is added. 5. the pressure is increased. Explanation: 2 SO 2 (g) + O 2 (g) 2 SO 2 (g) + heat According to Le Chatelier’s principle, the amount o± reactant SO 2 (g) is increased when the equilibrium shi±ts to the le±t. This will
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Version 033 – EXAM 2 – Fakhreddine – (53605) 2 happen when another reactant (O 2 ) is re- moved. For an exothermic reaction decreasing
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/15/2009 for the course CH 53625 taught by Professor Fakhreddine during the Spring '09 term at University of Texas at Austin.

Page1 / 5

Exam 02 - Version 033 EXAM 2 Fakhreddine (53605) This...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online