Presentation on theme: "AP Chemistry Jeopardy 2000 Structure of Matter States of Matter Physical Chemistry Chemical Bonding Chemical Reactions $100 $200 $400 $800 $1000 $1500."— Presentation transcript:
AP Chemistry Jeopardy 2000
Structure of Matter States of Matter Physical Chemistry Chemical Bonding Chemical Reactions $100 $200 $400 $800 $1000 $1500 $100 $200 $400 $800 $1000 $1500 $100 $200 $400 $800 $1000 $1500 $100 $200 $400 $800 $1000 $1500 $100 $200 $400 $800 $1000 $1500 AP CHEM JEOPARDY $2000
Chemical Bonding $100B DAILY DOUBLE
Q - Which atom has a larger atomic radius? A) ArC) Cl B) NaD) Li Chem Bond $100
Q - How Many Sigma and Pi bond does N2 contain? A) one sigma, four pi B) two sigma, two pi C) three sigma D) three pi E) one sigma, two pi Chem Bond $200
Chem Bond $400 What are the the three atoms that bond to hydrogen in hydrogen bonding?
Nitrogen Oxygen Fluorine
Chem Bond $800 What are the two ways for a molecule to have a bent geometry?
A tetrahedral arrangement with two unshared electron pairs (~109.5°) A planar triangle geometry with one unshared electron pair (~120°)
Chem Bond $1000 What are the four types of Unit Cells possible for crystal structures??
Simple Cubic2r = s Face centered4r = 2 ( sqr. Root r) Body centered4r = s ( cube root r) Hexagonal
Q - Which is NOT linear? a) CO2 b) H2O c) BeF2 d) N2 Chem Bond $1500
Chem Bond $2000 A) Increased Dipole - Dipole Forces B) Hydrogen Bonding C) Increased London Dispersion Forces Why is the P-Cl bond in PCl5 a stronger bond than the C-O in carbon monoxide?
States of Matter $100 Which of the following is not a gas at room temperature? A) O 2 B) Ar C) F 2 D) Br 2
Bromine is a red liquid
States of Matter $200 Under what conditions would a substance sublimate at room conditions (25 °C and 1 atm)? A) the critical temperature must be below the triple point B) the slope of the fusion line should be negative C) the triple point must be at a pressure greater than 1 atm and 25°C D) the solid phase must be more dense than the liquid phase
States of Matter $400 What would happen to the pressure of a gas if the temperature is tripled, the volume is doubled, and the number of gas molecules is quadrupled ?....
A) T x (1/3)(1/2)(1/4) B) T x (3/1)(2/1)(4/1) C) T x (3/1)(1/2)(4/1) D) T x (3/1)(1/2)(1/4)
Temp. is tripled P = kT Volume is doubled P=k(1/V) Moles is quad. P = kn
States of Matter $800 Is the slope for the solid/ liquid line in the phase diagram of water positive, negative, or can be either?
States of Matter $1000 The kinetic molecular theory predicts that at a given temperature...
A) All gases have the same KE B) All gas molecules have the same velocity C) Only real gas molecules collide with each other D) On average, heavier molecules move more slowly E) Elastic collisions result in the loss of energy.
States of Matter $1500 All of the following physical properties change as solute is added to the solution. Which is NOT a colligative property? A) Boiling PointD) Surface Tension B) Vapor PressureE) Melting Point C) Osmotic Pressure
States of Matter $2000 Which of the following is most likely to be soluble in hexane? A) KClD) H 2 O B) C 2 H 5 OHE) C 6 H 6 C) HC 2 H 3 O 2
Physical Chemistry $100 What is the free energy of a system at equilibrium?...
G = equilibrium < 0 if spontaneous > 0 if non-spontaneous
Physical Chemistry $200 When H is positive and S is negative, will temperature changes have an effect on the spontaneity of a reaction? YESNO
Physical Chemistry $400 The rate of reaction will be large if: A) G° is a large (-) number B) S° is a large (-) number C) H° is a large (-) number D) K eq is a large (+) number E) None of the above
Physical Chemistry $800 The Law of Dulong and Petit says that the molar specific heat of solid elements is approximately 25 J/molK. This suggests that...
a) The heat absorbed depends only on the number of atoms b) the heat absorbed depends on the volume change with temperature c) the heat absorbed can be calculated from the 1st Law of Thermodynamics d) this law is an oddity since it does not apply to elements that are liquids / gases
Physical Chemistry $1000 An inorganic catalyst doesnt... A) Ensure proper geometry B) Weaken existing bonds C) Lose effectiveness when heated D) Decrease the activation energy of a reaction
Catalysts lower the activation energy of a reaction thus increasing the rate by ensuring proper geometry and weakening existing bonds in the molecule. Only ORGANIC catalysts are effected by a temperature change.
Physical Chemistry $1500 What equation would you use to solve: How much heat does it take to raise 10 grams of water by 10°C?...
q = m c T
Physical Chemistry $2000 What is the equation is used to find how temperature changes affect rates of reaction?
ln k 2 =E a (T 2 - T 1 ) k 1 R T 2 T 1
Chemical Reactions $100 Which of the following would produce odor if heated? A) NH 3 D) PbI 2 B) Na+ (aq) E) A and C C) KI
Chemical Reactions $200 One mole of electrons is how many coulombs?
Chemical Reactions $400 A molecule of NaHSO 4 is... a) Acidic b) Basic c) Neutral
Na+ is neutral because it is the conjugate acid of a strong base. HSO 4 - is acidic because it can further produce H+ ions in solution (but it also has amphoteric properties).
Chemical Reactions $800 Which of the following compounds includes an element that has the same oxidation # as the chlorine in sodium chlorate, NaClO 3 ? A) K 3 Fe(CN) 6 D) (NH 4 ) 2 SO 4 B) KMnO 4 E) KClO 4 C) Al(NO 3 ) 3
Chemical Reactions $1000 DAILY DOUBLE
Which of the following statements is FALSE?
A) reduction involves a gain of e- B) batteries are galvanic cells C) a spontaneous reaction always has a (+) E°cell D) electrolysis reactions always produce a gas at at least one electrode E) Galvanic cells can be used to determine equilibrium constants
Chemical Reactions $1500 What will be the products of the following equation? FeCl 2 + HCl + KMnO 4 --> ???
FeCl 2 + HCl + KMnO 4 --> FeCl 3 + MnCl 2 + H 2 O + KCl Ox: Fe2 + --> Fe3+ + e- Red: MnO H + --> Mn2 + + H 2 O (K+ and Cl- are spectator ions)
Chemical Reactions $2000 Predict the net ionic equation for the following reaction and tell what form the reactants will be present... The electrolysis of KI in water
Ox: 2 I---> I 2 + 2e- Red: 2 H 2 O + 2 e- --> H OH- 2 H 2 O + 2 I- --> H OH- + I 2 Electrolysis of KI in water. (H 2 O has a E° red closer to zero than K+)
Structure of Matter $100 Which of the following elements has the greatest number of p electrons?
A) C B) Si C) Fe D) Cl E) As
Even though some of the others have more p electrons in their OUTER shell, Arsenic has more TOTAL p electrons.
Structure of Matter $200 An electron with the four quantum numbers 3,2,-1,- 1 / 2 may be an electron in an unfilled sublevel of...
A) Ca B) Fe C) Al D) Ar E) Ag
B) Fe It says UNFILLED sublevel. Since the 1st two quantum #s are 3 and 2 that means an unfilled 3-d orbital. Fe is the only one with an unfilled 3-d orbital.
Structure of Matter $400 Chemical Properties are defined by the: A) ElectronsC) Neutrons B) ProtonsD) Ionization Energy C) Electronegativity
Structure of Matter $800 The best way to estimate the boiling points of Pd is to: A) average the b.p.s of Rh and Ag B) average the b.p.s of Ni and Pt C) average the b.p.s of Ir and Cu D) average the b.p.s of Co and Au E) None of the above will work.
Structure of Matter $1000 In which of the following pairs of elements is the element with the lower boiling point listed first? A) Na, CsD) Ba, Sr B) Te, SeE) I, Br C) P, N
States of Matter $1500 Carbon-14 has a half-life of 5730 years. How old is a wooden object if 70% of the C-14 has decayed? A) 2948 yrD) 4321 yr B) 1280 yrE) 7002 yr C) 9950 yr
Radioactive decay is a first order reaction therefore… Rate = kX ln Xo=kt X Ln 2 X = k t 1 / 2 X ln 2 = k t 1 / 2 ==> t 1 / 2 = 0.693/k
Structure of Matter $2000 An electron that falls from a higher energy level to n=3 emits a wavelength that fall in what series?
Lyman: n = --> n = 1 Balmer: n = --> n = 2 Paschen: n = --> n = 3 Ultraviolet Infrared VisibleVisible