1332+Spring+2008+Final - CHEM 1332 SPRING 2008(NEW FINAL...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
CHEM 1332 SPRING 2008 – (NEW) FINAL VERSION 1 NO CHEATING! 1. How much energy is needed to convert 180 grams of ice at -10 ºC to liquid water at 10 ºC? (The molar heat capacity of liquid water is 75.4 J/mol ºC; the molar heat capacity of ice is 40.2 J/mol ºC. The molar heat of vaporization of water is 40.7 kJ/mol. The molar heat of fusion of water is 6.02 kJ/mol.) (A) 71.8 kJ (B) 419 kJ (C) 64.2 kJ (D) 64.6 kJ (E) 11,620 J 2. Which physical property of a liquid is NOT the result of strong intermolecular forces? (A) high vapor pressure (B) high boiling point (C) high heat of fusion (D) high melting point (E) high heat of vaporization 3. Which of the following statements is TRUE? (A) Most gases are more soluble in liquids at higher temperatures. (B) In any solution, the solvent has to be liquid. (C) The solubility of a gas in a liquid is inversely proportional to the pressure. (D) If the heat of solution is negative for a solid in a liquid, then more solid will dissolve at lower temperatures. (E) All of these statements are false. 4. Commercial concentrated sulfuric acid is 98.0 % by mass H 2 SO 4 and has a density of 1.84 g/mL. Calculate the molarity of concentrated sulfuric acid. (A) 0.184 M (B) 9.20 M (C) 10.0 M (D) 15.6 M (E) 18.4 M 5. The activation energy of a reaction is 37.6 kJ/mol and the rate constant is 5.4 x 10 -3 s -1 at 45°C. What is the rate constant at 145°C? (A) 0.16 (B) 5.4 x 10 -3 (C) 8.4 x 10 -3 (D) 0.38 (E) 0.56 1
Background image of page 1

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

View Full DocumentRight Arrow Icon
6. Which of the following statements is correct for the reaction 2H 2 + O 2 → 2H 2 O(g)? (A) The rate of O 2 disappearance is twice the rate of the H 2 disappearance. (B) The rate of H 2 disappearance is twice the rate of the O 2 disappearance. (C) The rate of H 2 disappearance is equal to the rate of the H 2 O disappearance. (D) The rate of O 2 appearance is equal to the rate of the H 2 disappearance. (E) The rate of H 2 disappearance is equal to the rate of the O 2 disappearance. 7. The following data were obtained for the reaction 2A → products. time (min) [A] time (min) [A] time (min) [A] 0 1.20 1.1 1.00 2.3 0.80 4.0 0.60 5.1 0.50 6.3 0.40 8.0 0.30 10.3 0.20 What is the order of the reaction and why? (A) First because there is only one reactant species. (B) Second because the coefficient of A is 2. (C) Zero because of the shape of the plot of [A] vs t. (D) First because the half-life remains constant. (E) Second because the reaction rate decreases with time. 8. Given the initial rate data below for the reaction A(g) + B(g) → C(g) + D(g), what would the initial rate (in M/s) be if [A] = 0.10 M and [B] = 0.30 M? [A] (M) [B] (M) Rate (M/s) 0.20 0.10 2.2 x 10 -3 0.40 0.10 4.4 x 10 -3 0.20 0.20 8.8 x 10 -3 (A) 3.3 x 10 -3 (B) 1.7 x 10 -3 (C) 1.4 x 10 7 (D) 9.9 x 10 -3 (E) 3.3 x 10 -2 2
Background image of page 2
9. Which of the mechanisms is most likely, given the observed experimental rate law? Reaction is:
Background image of page 3

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

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 08/16/2011 for the course BIOL 1361-1362 taught by Professor Any during the Spring '08 term at University of Houston.

Page1 / 28

1332+Spring+2008+Final - CHEM 1332 SPRING 2008(NEW FINAL...

This preview shows document pages 1 - 4. Sign up to view the full document.

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