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Calorimetry Answers

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Which statement describes how a basic coffee cup calorimeter works?

A
It measures the mass of a substance given the specific heat and temperature of water in a cup of known size.
B
It measures the density of a substance given the mass, specific heat, and temperature of water in a cup of known size.
C
It uses the mass and specific heat of water along with a pressure gauge to measure the gain or loss of energy when a substance is added.
D
It uses the mass and specific heat of water along with a thermometer to measure the gain or loss of energy when a substance is added.
2
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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
3

Which statement best describes why specific heat capacity is often more useful than heat capacity for scientists when comparing two materials?

A
Specific heat capacity is an intensive property and does not depend on sample size.
B
Specific heat capacity is an extensive property and does not depend on sample size.
C
Specific heat capacity is an intensive property and depends on the sample size.
D
Specific heat capacity is an extensive property and depends on the sample size.
4

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
5

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
6

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
7

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
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

The specific heat of water is 4.18 J/(gi°C) and that of wood is 1.97 J/(gi°C). Which statement is correct?

A
Regardless of mass, wood will heat up less than water if the same heat is added.
B
Given equal masses, wood will heat up less than water if the same heat is added.
C
Given equal masses, water will heat up less than wood if the same heat is added.
D
Regardless of mass, water will heat up less than wood if the same heat is added.
10

A sample of an unknown substance has a mass of 0.465 kg. If 3,000.0 J of heat is required to heat the substance from 50.0°C to 100.0°C, what is the specific heat of the substance?Use .

Question illustration
A
0.00775 J/(gi°C)
B
0.0600 J/(gi°C)
C
0.129 J/(gi°C)
D
0.155 J/(gi°C)

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Calorimetry Answers — CR03101 Chemistry