Calorimetry Answers

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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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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 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

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

Loren has the samples of elements that are listed below at room temperature. He exposes the samples to the same heat source until each sample reaches a temperature of 90.0°C. 10 g of Al(s) ( = 0.897 J/(gi°C))10 g of Ag(s) (= 0.234 J/gi°C )10 g of Fe(s) ( = 0.450 J/gi°C)10 g of Zn(s) ( = 0.387 J/gi°C )From first to last, which lists the order in which these samples will reach 90.0°C?

Al, Fe, Zn, Ag

Ag, Zn, Fe, Al

Al, Fe, Ag, Zn

Ag, Al, Zn, Fe

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.

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.

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

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