Answers Chemistry A.1 - F26 - Jacob MetskerCalorimetry

Calorimetry Answers

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

temperature in degrees Celsius

temperature in kelvins

volume in liters

mass in grams

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

Specific heat capacity is an intensive property and does not depend on sample size.

Specific heat capacity is an extensive property and does not depend on sample size.

Specific heat capacity is an intensive property and depends on the sample size.

Specific heat capacity is an extensive property and depends on the sample size.

Which units express specific heat capacity?

J/°C, J/K, cal/°C, cal/K

J/(gi°C), J/(giK), cal/(gi°C), cal/(giK)

J, cal

°C, K

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

increased evaporation of the water

loss of gaseous reactants

inability to contain liquids

exchange of energy with the surroundings

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?

Regardless of mass, wood will heat up less than water if the same heat is added.

Given equal masses, wood will heat up less than water if the same heat is added.

Given equal masses, water will heat up less than wood if the same heat is added.

Regardless of mass, water will heat up less than wood if the same heat is added.

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 .

140 J

418 J

1,470 J

5,170 J

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 .

0.00775 J/(gi°C)

0.0600 J/(gi°C)

0.129 J/(gi°C)

0.155 J/(gi°C)

Which units express heat capacity?

J/°C, J/K, cal/°C, cal/K

J/(gi°C), J/(giK), cal/(gi°C), cal/(giK)

J, cal

°C, K

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 .

8.46 kJ

16.1 kJ

27.7 kJ

47.8 kJ

Which statement describes how a basic coffee cup calorimeter works?

It measures the mass of a substance given the specific heat and temperature of water in a cup of known size.

It measures the density of a substance given the mass, specific heat, and temperature of water in a cup of known size.

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.

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.

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