Ch.6 - Thermochemistry WorksheetSee all chapters
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Ch.1 - Intro to General Chemistry
Ch.2 - Atoms & Elements
Ch.3 - Chemical Reactions
BONUS: Lab Techniques and Procedures
BONUS: Mathematical Operations and Functions
Ch.4 - Chemical Quantities & Aqueous Reactions
Ch.5 - Gases
Ch.6 - Thermochemistry
Ch.7 - Quantum Mechanics
Ch.8 - Periodic Properties of the Elements
Ch.9 - Bonding & Molecular Structure
Ch.10 - Molecular Shapes & Valence Bond Theory
Ch.11 - Liquids, Solids & Intermolecular Forces
Ch.12 - Solutions
Ch.13 - Chemical Kinetics
Ch.14 - Chemical Equilibrium
Ch.15 - Acid and Base Equilibrium
Ch.16 - Aqueous Equilibrium
Ch. 17 - Chemical Thermodynamics
Ch.18 - Electrochemistry
Ch.19 - Nuclear Chemistry
Ch.20 - Organic Chemistry
Ch.22 - Chemistry of the Nonmetals
Ch.23 - Transition Metals and Coordination Compounds
Sections
Internal Energy
Calorimetry
Thermochemical Equation
Hess's Law
Enthalpy of Formation
End of Chapter 6 Problems
Additional Practice
Units of Energy
Endothermic & Exothermic Reactions
Additional Guides
Enthalpy
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Next SectionThermochemical Equation

Solution: When 2112 J of heat energy is added to 45.8 g of ethanol. C2H6O, the temperature increase by 18.8°C. Calculate the molar heat capacity of C2H6O.

Problem

When 2112 J of heat energy is added to 45.8 g of ethanol. C2H6O, the temperature increase by 18.8°C. Calculate the molar heat capacity of C2H6O.

Solution
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Practice Problems
Two solids of equal mass, labeled X and Y, are pla...
How much energy is required to change the temperat...
The molar heat capacity of silver is 25.35 J/mol•°...
Three separate 3.5g blocks of Al, Cu, and Fe at 25...
Adding water to a steel pan on a flame slows the r...
When a 45.0 g sample of an alloy at 100.0 °C is dr...
Two aqueous solutions are both at room temperature...
Calculate q (in kJ) when 2.00 g of water is heated...
A 1.00 g sample of NH 4NO3 is decomposed in a bomb...
Which substance (with specific heat capacity provi...
If three samples of silver, one with a mass of 10....
When a fresh breath of air is drawn into the lungs...
How much heat is absorbed by a pan made of iron, w...
A student constructs a "coffee cup" calorimeter th...
In a bomb calorimeter, reactions are carried out a...
Determine the specific heat capacity of an alloy t...
When 75.4 J of energy is absorbed by 0.25 mol of C...
Suppose a 50.0 g block of silver at 100°C is place...
Which of the following statements are correct? A....
The combustion of toluene has a ∆Erxn of -3.91 x 1...
If it takes 0.216 kJ of heat to raise the temperat...
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Determine the final temperature when a 25.0 g piec...
When 68.00 J of energy are added to a sample of Ga...
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The specific heat of copper metal is 0.385 J/g K. ...
A student mixes 100 mL of 0.50 M NaOH with 100 mL ...
In constant-volume calorimetry, what is FALSE?   ...
Which substance (with specific heat capacity provi...
More heat is derived from cooling one gram of stea...
A sample of 1.67 grams of compound Y is burned com...
The same reaction in a bomb and coffee-cup calorim...
A total of 2.25 moles of a compound are allowed to...
A piece of iron (mass = 100.0 g) at 398 K is place...
The molar heat capacity of silver is 25.35 J/mol ×...
Which of the following substances (with specific h...
How much energy must be transferred to raise the t...
A 55.0-g piece of metal is heated in boiling water...
What is heat capacity?
Explain the difference between heat capacity and s...
Explain how the high specific heat capacity of wat...
Spilling room-temperature water over your skin on ...
What are the units of molar heat capacity?
What are the units of specific heat?
If you know the specific heat of copper, what addi...
What is the specific heat of liquid water?
We pack two identical coolers for a picnic, placin...
Elements C...
Nutrition label for whole milk.Which value woul...
Which releases the greatest amount of energy per g...
Assuming that there is an uncertainty of 0.002 oC ...
What is calorimetry?
Explain the difference between a coffee-cup calori...
Is the change in enthalpy for a reaction an extens...
In order to obtain the largest possible amount of ...
A sample of a hydrocarbon is combusted completely ...
The same reaction, with exactly the same amount of...
Coffee-cup calorimeter. This simple apparatus i...
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Hess’s law provides a useful means of calculating ...
Enthalpy diagram for combustion of 1 mol of met...
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Which is a greater source of energy as food, 5 g o...
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A coffee-cup calorimeter contains 150.0 g of wate...
A silver block, initially at 57.6 oC, is submerged...
A 31.5 g wafer of pure gold initially at 69.7 oC ...
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A 2.56 g sample of a substance suspected of being...
A 2.56 g sample of a substance suspected of being...
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A coffee-cup calorimeter contains 150.0 g of wate...
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To determine whether a shiny gold-colored rock is ...
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Suppose that 26 g of each of the following substa...
Suppose that 26 g of each of the following substa...
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The hydrocarbons acetylene (C2 H2 ) and benzene (C...
The hydrocarbons acetylene (C2 H2 ) and benzene (C...
Three common hydrocarbons that contain four carbon...
Three common hydrocarbons that contain four carbon...
The heat of vaporization of water at 373 K is 40.7...
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The heat of vaporization of water at 373 K is 40.7...
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Using information in Appendices B and C in the tex...
A coffee-cup calorimeter contains 150.0 g of wate...
A coffee-cup calorimeter contains 150.0 g of wate...
5.00 moles of an ideal gas are contained in a cyli...
Liquid sodium is being considered as an engine coo...
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A sample of copper absorbs 43.6 kJ of heat, result...
If you have 340.0 mL of water at 25.00 °C and add ...
Determine the specific heat capacity of an alloy t...
Calculate the amount of heat (in kJ) necessary to ...
Calculate the amount of heat (in kJ) required to r...
How much heat, in kJ, is required to raise the tem...
A house is designed to have passive solar energy f...
A coffee-cup calorimeter of the type shown in Figu...
A coffee-cup calorimeter of the type shown in Figu...
A coffee-cup calorimeter of the type shown in Figu...
A coffee-cup calorimeter of the type shown in Figu...
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NOTE: YOUR ANSWER SHOULD BE IN KJ/MolWhen 0.535 g ...
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Two solid objects, A and B, are placed in boiling ...
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The two aqueous solutions are not at room temperat...
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It takes 75.0 J to raise the temperature of an 19....
A 2.78g lead weight, initially at 11.0°C, is subme...
Explain the difference between heat capacity and s...
Diluting sulfuric acid with water is highly exothe...
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Would the amount of heat absorbed by the dissoluti...
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Exactly 1.5 g of a fuel is burned under conditions...
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Write a balanced equation and draw an enthalpy dia...
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Two substances, lead and glass (Pyrex), initially ...
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A 32.6 g iron rod, initially at 22.3 oC, is submer...
A 30.0-g sample of water at 280. K is mixed with 5...
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An unknown mass of each substance, initially at 24...
An unknown mass of each substance, initially at 24...
An unknown mass of each substance, initially at 24...
An unknown mass of each substance, initially at 24...
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The specific heat capacity of silver is 0.24 J/°C•...
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In a bomb calorimeter, the reaction vessel is surr...
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Calculate the heat capacity, in joules and in calo...
Calculate the heat capacity, in joules and in calo...
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How much heat, in joules and in calories, is requi...
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The combustion of 0.1584 g benzoic acid increases ...
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Use standard enthalpies of formation to calculate ...
Palmitic acid (C16 H32 O2 ) is a dietary fat found...
A sample of nickel is heated to 99.8°C and placed ...
Palmitic acid (C16H32O2) is a dietary fat found in...
Liquid sodium is being considered as an engine coo...
A 295-g aluminum engine part at an initial tempera...
An unknown volume of water at 18.2°C is added to 2...
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Find w for the change in state of 1.0 mol H2O(l) a...
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The following scenes represent a gaseous reaction ...
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Table 5.2Specific Heats of Some Substances at 298 ...
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Methanol (CH3OH) is used as a fuel in race cars.Yo...
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