Test Form 2

Test Form 2 - FORM #9 Chem 1202 Final Exam Spring 2004 1...

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

View Full Document Right Arrow Icon
FORM #9 ————————————————————————————————————— Chem 1202 Final Exam Spring 2004 ————————————————————————————————————— 1 Which one of these statements does not accurately describe the condition of equilibrium for this reaction? A ± g   v B ± g   K p ± 4500 ( A ) At equilibrium the rate of reaction for A ± g   v B ± g   equals the rate of reaction for B ± g   v A ± g   ( B )Atequilibriumthemixturewillcontainmostlyproducts ( C )Atequilibriumthemixturewillcontainmostlyreactants ( D ) At equilibrium there is no change in the amounts of reactant and product present in the mixture ( E ) K p ± P B P A 2 Which one of these substances is the strongest acid in water? ( A )CH 4 ( B )Na ² ( C )HC e O 4 ( D )HBrO 3 ( E e O 3 3 Which of the following statements is true for the reaction 2NaC e ± s   v 2Na ± s   ² C e 2 ± g   H rxn o ±² 821.8 kJ/mol ( A )Thereactionisexothermic ( B ) The reaction produces heat ( C ) The reaction cools off the surroundings ( D ) H rxn o 410.9 kJ for the reaction Na ± s   ² 1 2 C e 2 ± g   v NaC e ± s   ( E ) H rxn o 821.8 kJ for the reaction 2Na ± s   ² C e 2 ± g   v 2NaC e ± s   4 Calculate H rxn o for the reaction
Background image of page 1

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

View Full DocumentRight Arrow Icon
2CF 4 ± g   ± 4HF ± g   v C 2 H 4 ± g   ± 6F 2 ± g   Compound H f o kJ/mol C 2 H 4 ± g   ± 52.3 CF 4 ± g   " 680.0 HF ± g   " 268.5 ( A ) ± 2486.3 kJ ( B ) ± 2381.7 kJ ( C ) " 2486.3 kJ ( D ) " 2381.7 kJ ( E ) ± 896.2 kJ 5 Which of these statements is NOT TRUE according to the theory of how chemical reactions take place. (Molecular collision theory) ( A ) A catalyst provides an alternative pathway for reaction. ( B ) In most reactions only a small fraction of collisions between reactants will create products. ( C ) Reactants must collide in a certain orientation in order for reaction to occur. ( D ) Increasing temperature increases the number of reactants with enough energy to react. ( E ) Reactants must have an energy less than E a in order for reaction to occur. 6 What is the equilibrium constant K a for the weak acid HC 9 H 7 O 4 at 3. 19 ± 10 2 K? The value of G rxn o ² 20. 1 kJ/mol ( A ) 1. 174 ± 10 " 3 ( B ) 0.9924 ( C ) 5. 112 ± 10 " 4 ( D ) 0.4638 ( E ) 1. 956 ± 10 3 7 What is the pH of a 0.099 M solution of the salt NaCHO 2 ? The K a for the weak acid HCHO 2 is 1. 8 ± 10 " 4 . ( A ) 9. 251 ( B ) 11. 63 ( C ) 5. 630 ( D ) 7.00
Background image of page 2
( E ) 8. 37 8 Plutonium has an isotope that undergoes radioactive decay. The reaction follows first order kinetics with a rate constant of 9. 118 ± 10 " 13 s " 1 .Howmanysecondsdoesi ttake for a sample of 1000 radioactive plutonium atoms to decay to 660 atoms?
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.

Page1 / 12

Test Form 2 - FORM #9 Chem 1202 Final Exam Spring 2004 1...

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