Question # 1 (Multiple Answer) Choose from the following reactions the ones that represent exothermic chemical reactions:

A) oxidation
B) sugar dehydration
C) mixing acid with water
D) mixing ammonium nitrate with water

Question # 2 (Multiple Choice) Calculate the final velocity of a small round object dropped 0.45 m in an airless environment:

A) 4.4 m/s
B) 3.8 m/s
C) 9.3 m/s
D) 3.2 m/s

Question # 3 (Multiple Choice) Calculate the final temperature of a block of gold (initially at 30.0 degrees C) that has a mass of 1.40 g and has 10.80 calories of heat added to it (the cp of gold = 0.030 ca/g degreeC)

A) 140 K
B) 206 degrees C
C) 812 K
D) 287 degrees C

Question # 4 (Multiple Choice) What is the kinetic energy of a bullet (with mass of 0.0200 kg) fired at a muzzle velocity of 1.05 m/s?

A) 0.035 J
B) 1.10 E - 2 J
C) 4.02 E - 1 J
D) 405 J

Question # 5 (Multiple Answer) Why is the thermal conductivity of metals so much greater than wood products?

A) The freedom with which the electrons move about in the metal allows the heat to be dispersed throughout the metal.
B) The hydrogen bonding within the metals allows heat to flow evenly throughout
C) The metallic bonding of the atoms is such that all heat is converted into radiation
D) The wood products are organic molecules that hold on to their electrons much more strongly than metals

Question # 6 (Multiple Choice) 3.50 grams of ice at -5 degrees C would require how many calories of heat to be turned into steam at 150 degrees C?

A) 5 400 cal
B) 4050 cal
C) 2 600 cal
D) 1 850 cal

Question # 7 (Multiple Choice) Given that a rocket in space traveling at 25 m/s accelerates up to 30. m/s over a period of one minute, what would be the acceleration of that rocket (in m/s^2)?

A) 2.4
B) 3.5
C) 9.1
D) 8.3
E) 1.2

Question # 8 (Multiple Choice) The slope of a velocity versus time graph gives a measure of the:

A) speed of the object
B) acceleration of the object
C) direction of the object
D) force being applied to the object

Question # 9 (Multiple Choice) Convert 15.0 km/s to m/hr

A) 5.4 E 7 m/hr
B) 3.8 E 6 m/hr
C) 2.4 E 9 m/hr
D) 1.4 E 4 m/hr

Question # 10 (Multiple Answer) Choose the examples that are endothermic chemical reactions:

A) photosynthesis
B) oxidation
C) electrolysis
D) dissolving NaOH in water

Question # 11 (Multiple Choice) If a 10. kg rock is placed on a cliff 80. meters high, how much potential energy does it possess?

A) 7.8 E 3 J
B) 4.2 E 4 J
C) 2.9 E 7 J
D) 3.8 E 3 J

Question # 12 (Multiple Answer) Give the name of substances that undergo sublimation:

A) carbon dioxide
B) moth balls
C) ball bearings
D) paradichlorobenzene

Question # 13 (Multiple Choice) Given an initial temperature of 40.0 degrees C, an initial pressure of 4.0 atm, what would be the final pressure if the temperature were decreased to 10.0 degrees C?

A) 3.8 atm
B) 3.6 atm
C) 1.9 atm
D) 202.6 kPa

Question # 14 (Multiple Choice) Balance the following equation: calcium phosphate + silver chloride --> calcium chloride + silver phosphate

A) coefficient ratio: 1, 6, 3, 2
B) coefficient ratio: 2, 1, 2, 1
C) coefficient ratio: 3, 1, 6, 1
D) coefficient ratio: 1, 1, 2, 1

Question # 15 (Multiple Choice) 10.0 moles of carbon (IV) oxide contains ____________ molecules?

A) 6.02 E 24 mlcl
B) 6.02 E 23 mlcl
C) 1.21 E 24 mlcl
D) 1.21 E 23 mlcl
E) 10.0 mlcl

Question # 16 (Multiple Answer) Choose all the correct values for atmospheric pressure at sea level:

A) 101.3 kPa
B) 14.7 lb/in^2
C) 1 atm
D) 760 mm Hg
E) 1.0 E 5 N/m^2

Question # 17 (Multiple Choice) Given 20.0 grams of water at 100 degrees C, how much energy is needed to convert it all to steam (at the same temperature):

A) 42 400 J
B) 16 400 cal
C) 10 800 cal
D) 38 200 J

Question # 18 (Multiple Answer) Which of the following is an advantage of CO2 fire extinguishers?

A) does not conduct electricity
B) sublimates to smother fire
C) pressure maintained easily in canister
D) no water damage for cleanup
E) very cold to absorb heat from fire

Question # 19 (Multiple Choice) Calculate the weight of an object with a rest mass of 10. 5 kg

A) 110 N
B) 103 N
C) 98.0 N
D) 117 N

Question # 20 (Multiple Choice) Calculate the formula mass for sodium carbonate

A) 113 g
B) 119 g
C) 98.2 g
D) 116 g
E) 106 g