Thermochemical Equations Answers

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The initial temperature of a bomb calorimeter is 28.50°C. When a chemist carries out a reaction in this calorimeter, its temperature decreases to 27.45°C. If the calorimeter has a mass of 1.400 kg and a specific heat of 3.52 J/(gi°C), how much heat is absorbed by the reaction?Use .

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A
140 J
B
418 J
C
1,470 J
D
5,170 J
2
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Which units express heat capacity?

A
J/°C, J/K, cal/°C, cal/K
B
J/(gi°C), J/(giK), cal/(gi°C), cal/(giK)
C
J, cal
D
°C, K
3

What would be the greatest difference in using an open ceramic coffee mug rather than an insulated mug with a lid as a calorimeter?

A
increased evaporation of the water
B
loss of gaseous reactants
C
inability to contain liquids
D
exchange of energy with the surroundings
4

What is the specific heat of a substance if a mass of 10.0 kg increases in temperature from 10.0°C to 70.0°C when 2,520 J of heat is applied?Use .

Question illustration
A
0.00420 J/(gi°C)
B
0.00661 J/(gi°C)
C
238 J/(gi°C)
D
252 J/(gi°C)
5

Complete combustion of a 0.600-g sample of a compound in a bomb calorimeter releases 24.0 kJ of heat. The bomb calorimeter has a mass of 1.30 kg and a specific heat of 3.41 J/(gi°C). If the initial temperature of the calorimeter is 25.5°C, what is its final temperature?Use .

Question illustration
A
30.9°C
B
34.5°C
C
44.0°C
D
51.5°C
6

Which units express specific heat capacity?

A
J/°C, J/K, cal/°C, cal/K
B
J/(gi°C), J/(giK), cal/(gi°C), cal/(giK)
C
J, cal
D
°C, K
7

A sample of hexane (C6H14) has a mass of 0.580 g. The sample is burned in a bomb calorimeter that has a mass of 1.900 kg and a specific heat of 3.21 J/giK. What amount of heat is produced during the combustion of hexane if the temperature of the calorimeter increases by 4.542 K?Use .

Question illustration
A
8.46 kJ
B
16.1 kJ
C
27.7 kJ
D
47.8 kJ
8

The heat capacity of a sample should be divided by which quantity to find the specific heat capacity?

A
temperature in degrees Celsius
B
temperature in kelvins
C
volume in liters
D
mass in grams
9

Which statement defines calorimeter?

A
a device that measures the heat that is gained or lost in a chemical change
B
a device that measures the potential energy of an element
C
a device that is used to measure heat capacity
D
a device that is used to measure temperature
10

Which statement defines the heat capacity of a sample?

A
the temperature of a given sample
B
the temperature that a given sample can withstand
C
the quantity of heat that is required to raise the sample’s temperature by 1°C (or Kelvin)
D
the quantity of heat that is required to raise 1 g of the sample by 1°C (or Kelvin) at a given pressure

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