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Study Quiz 1
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1
Which of the following is true?
A)The basic components of a calorimeter are water, a thermometer, and an isolated system.
B)The basic components of a calorimeter are water, a thermometer, and an open system.
C)A calorimeter is used to measure changes in potential energy.
D)None of the above
2
Which of the following assumptions must be made in a coffee-cup calorimetry experiment?
A)No heat is exchanged with the surroundings outside the calorimeter.
B)The amount of heat that is exchanged with the calorimeter itself is small enough to be ignored.
C)Both A and B
D)None of the above
3
A 30.0 g sample of a metal was heated in a hot water bath to 80°C. It was then quickly transferred to a coffee-cup calorimeter. The calorimeter contained 100.0 g of water at a temperature of 20°C. The final temperature of the contents of the calorimeter was 25°C. What is the specific heat capacity of the metal?
A)-0.66 J/g·°C
B)1.27 J/g·°C
C)-1.27 J/g·°C
D)-11.4 J/g·°C
4
Which of the following is not true?
A)When carrying out a calorimetry experiment in a dilute solution, the solution itself absorbs or releases the energy.
B)A coffee-cup calorimeter is well-suited to determining the enthalpy changes of reactions in dilute aqueous solutions because
C)Both A and B are true.
D)Neither A nor B are true.
5
Which of the following is true for a coffee-cup calorimeter?
A)Its heat capacity must be determined for proper heat capacity calculations.
B)The heat capacity values involved are generally very large.
C)It is open to the atmosphere.
D)The water in the calorimeter absorbs the energy that is released by a chemical reaction.
6
Which of the following do chemists use to calculate the enthalpy changes of combustion reactions?
A)coffee-cup calorimeters
B)bomb calorimeters
C)polystyrene calorimeters
D)ice calorimeters
7
Which of the following is most true?
A)The heat capacity of a calorimeter takes into account the heat that all parts of the calorimeter can lose.
B)The heat capacity of a calorimeter incorporates the heat capacity of the water, thermometer, and stirrer.
C)You cannot assume that the heat capacity of a bomb calorimeter is small enough to be negligible.
D)The heat capacity of a calorimeter takes into account the heat that all parts of the calorimeter can gain.
8
The enthalpy of mayonnaise is expressed in
A)kJ/g
B)kJ/mol
C)mol/kJ
D)g/kJ





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