2)
The above chemical reaction is best described as i and the energy term if taken out of the reaction would have a ii sign. Row i & Row ii
A) endothermic & positive
B) exothermic & positive
C) endothermic & negative
D) exothermic & negative
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
3)
Which of the following compounds is classified as a carbohydrate? A) C12H22O11(s)
B) CH3OH(l)
C) NaHCO3(s)
D) CH3COOH(aq)
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
4)
A 500 mL slurpee contains 52.0 grams of glucose. The molar enthalpy of combustion of glucose is -3989.3 kJ/mol. The quantity of energy that can be obtained from drinking a slurpee is A) 1150 kJ
B) 13 800 kJ
C) 1990 kJ
D) 7.98 kJ
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
5)
Equal volumes of hot coffee are poured into an aluminum cup and a tin cup. After two minutes, the coffee in the aluminum cup is cooler. This fact is explained by the fact that theA) heat of formation of aluminum is less than the heat of formation of tin
B) heat of formation of aluminum is greater than the heat of formation of tin
C) specific heat capacity of aluminum is less than the specific heat capacity of tin
D) specific heat capacity of aluminum is greater than the specific heat capacity of tin
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
6)
A student compared the specific heat capacity of water to the specific heat capacity of tin. In regard to this comparison, which of the following statements is true? A) Water has the ability to hold more heat energy than an equal mass of tin.
B) Tin has the ability to hold more heat energy than an equal mass of water.
C) Water will have the highest temperature change if an equal amount of heat is added.
D) Tin will have the lowest temperature change if an equal amount of heat is added.
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
7)
A student adds 110 kJ of heat to a calorimeter containing 250 grams of water. The temperature in the calorimeter changes from 23°C to 98°C. The percent efficiency of the calorimeter is A) 71.4%
B) 78.6%
C) 75.0%
D) 93.3%
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
11)
Which of the following potential energy diagrams represents equation #1? Equations > Thumbnail #1
A) Thumbnail #2
B) Thumbnail #3
C) Thumbnail #4
D) Thumbnail #5
Quick Reply
