Answers FPS Conceptual Science BCalorimetry

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 .

140 J

418 J

1,470 J

5,170 J

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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

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

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 .

0.00420 J/(gi°C)

0.00661 J/(gi°C)

238 J/(gi°C)

252 J/(gi°C)

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 .

30.9°C

34.5°C

44.0°C

51.5°C

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

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

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

Which statement defines calorimeter?

a device that measures the heat that is gained or lost in a chemical change

a device that measures the potential energy of an element

a device that is used to measure heat capacity

a device that is used to measure temperature

Which statement defines the heat capacity of a sample?

the temperature of a given sample

the temperature that a given sample can withstand

the quantity of heat that is required to raise the sample’s temperature by 1°C (or Kelvin)

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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