Chemistry Chemistry Practice Problems Solutions Library

Calorimetry Solutions Library

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418 solutions

Calorimetry

Q. The specific heat of water is 4.18 J/ (g ⋅ °C). Calculate the molar heat capacity of water.Express your answer to three significant figures and inc...

Solved • Jul 2, 2020

Calorimetry

Q. A volume of 115 mL of H2O is initially at room temperature (22.00 °C). A chilled steel rod at 2.00 °C is placed in the water. If the final temperat...

Solved • Jul 2, 2020

Calorimetry

Q. The amount of boiling water required to raise the temperature of 25.0 kg of water in the bath to body temperature is 4.80 kg. In this process, the ...

Solved • Jul 2, 2020

Calorimetry

Q. How much boiling water would you need to raise the bath to body temperature (about 37 °C)? Assume that no heat is transferred to the surrounding en...

Solved • Jul 2, 2020

Calorimetry

Q. The molar heat capacity of silver is 25.35 J/ mol ⋅ °C. What is the specific heat of silver?Express your answer with the appropriate units.Parts B ...

Solved • Jul 2, 2020

Calorimetry

Q. The molar heat capacity of silver is 25.35 J/ mol ⋅ °C. How much energy would it take to raise the temperature of 11.4 g of silver by 12.8 °C?Expre...

Solved • Jul 2, 2020

Calorimetry

Q. It takes 52.0 J to raise the temperature of an 11.4 g piece of unknown metal from 13.0 °C to 24.1 °C. What is the specific heat for the metal?Expre...

Solved • Jul 2, 2020

Calorimetry

Q. Raising the temperature of 32.0 g of a particular metal by 25 °C required 456 J of heat. What is the most likely identity of this metal?Enter the a...

Solved • Jul 2, 2020

Calorimetry

Q. Using the equation y = 25x + 0.015, where y represents specific heat and x represents the inverse of atomic mass, calculate the atomic mass of an e...

Solved • Jul 2, 2020

Calorimetry

Q. In slope-intercept form, what is the equation for the line in Part B (specific heat vs. atomic mass–1)?Express your answer in terms of x and approp...

Solved • Jul 2, 2020

Calorimetry

Q. Plot the graph of specific heat versus the inverse of atomic mass. Include five points, one for each of the five metals listed in the introduction....

Solved • Jul 2, 2020

Calorimetry

Q. A linear plot refers to a straight line created when two variables are graphed. Use the data displayed in the table to determine which of the follo...

Solved • Jul 2, 2020

Calorimetry

Q. In the following experiment, a coffee-cup calorimeter containing 100 mL of H2O is used. The initial temperature of the calorimeter is 23.0 °C. If 8...

Solved • Jul 2, 2020

Calorimetry

Q. Consider the reactionC12H22O11(s) + 12 O2(g) → 12 CO2(g) + 11 H2O(l)in which 10.0 g of sucrose, C12H22O11, was burned in a bomb calorimeter with a ...

Solved • Jul 2, 2020

Calorimetry

Q. A calorimeter contains 35.0 mL of water at 14.0 °C. When 1.40 g of X (a substance with a molar mass of 43.0 g/mol) is added, it dissolves via the r...

Solved • Jul 2, 2020

Calorimetry

Q. A total of 2.00 mol of a compound is allowed to react with water in a foam coffee cup and the reaction produces 129 g of solution. The reaction cau...

Solved • Jul 2, 2020

Calorimetry

Q. A new metal alloy is found to have a specific heat capacity of 0.863 J/ (g °C). First, 23 g of the new alloy is heated to 160. °C. Then, it is plac...

Solved • Jul 2, 2020

Calorimetry

Q. A mass of 31.5 g of an unknown solid initially at 180.0 °C is added to an ideal constant-pressure calorimeter containing 100.0 g of water (Cs, wate...

Solved • Jul 2, 2020

Calorimetry

Q. A 1.5 kg block of iron at 36°C is rapidly heated by a torch such that 13 kJ is transferred to it. What temperature would the block of iron reach (a...

Solved • Jul 2, 2020

Calorimetry

Q. Suppose 1 kg each of water (4.19 J/(g⋅°C)), brick (0.90 J/(g⋅°C)), iron (0.46 J/(g⋅°C)), and olive oil (1.79 J/(g⋅°C)) were held at the same initia...

Solved • Jun 30, 2020

Calorimetry

Q. The combustion of exactly 1.000 g of benzoic acid in a bomb calorimeter releases 26.38 kJ of heat. If the combustion of 0.550 g of benzoic acid cau...

Solved • Jun 30, 2020

Calorimetry

Q. Which dietary substance (sugar or fat) contains more Calories per gram?(a) sugar(b) fat

Solved • Jun 25, 2020

Calorimetry

Q. What is the caloric content of sucrose in Cal/g?Express your answer using four significant figures.

Solved • Jun 25, 2020

Calorimetry

Q. Dry ice is solid carbon dioxide. Instead of melting, solid carbon dioxide sublimes according to the following equation: CO2 (s) → CO2 (g). When dry...

Solved • Jun 25, 2020

Calorimetry

Q. What is the caloric content of palmitic acid in Cal/g?Express your answer using four significant figures. 

Solved • Jun 25, 2020

Calorimetry

Q. One tablespoon of peanut butter has a mass of m. It is combusted in a calorimeter whose heat capacity is C. The temperature of the calorimeter rise...

Solved • Jun 25, 2020

Calorimetry

Q.  Hydrogen and methanol have both been proposed as alternatives to hydrocarbon fuels.How does the energy of these fuels compare to that of octane (C...

Solved • Jun 25, 2020

Calorimetry

Q.  Hydrogen and methanol have both been proposed as alternatives to hydrocarbon fuels.Which fuel contains the most energy in the least mass?

Solved • Jun 25, 2020

Calorimetry

Q.  Hydrogen and methanol have both been proposed as alternatives to hydrocarbon fuels.Use standard enthalpies of formation to calculate the amount of...

Solved • Jun 25, 2020

Calorimetry

Q. Hydrogen and methanol have both been proposed as alternatives to hydrocarbon fuels. Use standard enthalpies of formation to calculate the amount of...

Solved • Jun 25, 2020

Calorimetry

Q. A 27.5 g aluminum block is warmed to 65.0°C and plunged into an insulated beaker containing 55.1 g water initially at 22.4°C. The aluminum and the ...

Solved • Jun 25, 2020

Calorimetry

Q. If 50.0 mL of ethanol (density = 0.789 g/ mL) initially at 7.0 °C is mixed with 50.0 mL of water (density = 1.0 g/ mL) initially at 28.4 °C in an i...

Solved • Jun 25, 2020

Calorimetry

Q. Which fuel contributes least to global warming per kJ of heat produced?(a) octane(b) propane(c) methane

Solved • Jun 25, 2020

Calorimetry

Q. Determine the mass of CO2 produced by burning enough of octane to produce 2.50×102 kJ of heat.C8H18 (l) + 25 O2 (g) → 8 CO2 (g) + 9 H2O (g) ΔH°rxn ...

Solved • Jun 25, 2020

Calorimetry

Q. Determine the mass of CO2 produced by burning enough of propane to produce 2.50×102 kJ of heat.C3H8 (g) + 5 O2 (g) → 3 CO2 (g) + 4 H2O (g) ΔH = -22...

Solved • Jun 25, 2020

Calorimetry

Q. LP gas burns according to the following exothermic reaction: C3H8 (g) + 5 O2 (g) → 3 CO2 (g) + 4 H2O (g) ΔH°rxn = - 2044 ( kJ)(a) What mass of LP g...

Solved • Jun 25, 2020

Calorimetry

Q. Evaporating sweat cools the body because evaporation is an endothermic process:H2O(l) → H2O(g)                 ΔH°rxn = +44.01kJEstimate the mass o...

Solved • Jun 25, 2020

Calorimetry

Q. Determine the mass of CO2 produced by the burning enough of methane to produce 2.50×102 kJ of heat.CH4 (g) + 2 O2 (g) → CO2 (g) + 2 H2O (g) ΔH°rxn ...

Solved • Jun 25, 2020

Calorimetry

Q. Which of the following best defines specific heat? a. The amount of heat required to increase the temperature of 1 mol of a substance by 1 °C. b. T...

Solved • Apr 28, 2020

Calorimetry

Q. Calculate q when 28.6 g of water is heated from 22.0°C to 78.3°C.(the specific heat capacity for water = 4.184 J/(g•°C).A. 0.385 kJ B. 1.61 kJ C. 6...

Solved • Apr 15, 2020

Calorimetry

Q. A researcher studying the nutritional value of a new candy places a 5.80-gram sample of the candy inside a bomb calorimeter and combusts it in exce...

Solved • Apr 9, 2020

Calorimetry

Q. Suppose 1.25 g of steam at 100°C condenses on an insulted 65.0 g block of iron (heat capacity 0.449 J/g°C) that is initially at 20.0°C The final te...

Solved • Jan 23, 2020

Calorimetry

Q. Under constant pressure conditions, a 107 g block of metal at 125°C is added to a mixture of 120 g of water and 22 g of ice at 0°C. As a result, th...

Solved • Dec 19, 2019

Calorimetry

Q. Under constant pressure conditions, a 107 g block of metal at 125°C is added to a mixture of 120 g of water and 22 g of ice at 0°C. As a result, th...

Solved • Dec 19, 2019

Calorimetry

Q. Under constant pressure conditions, a 107 g block of metal at 125°C is added to a mixture of 120 g of water and 22 g of ice at 0°C. As a result, th...

Solved • Dec 19, 2019

Calorimetry

Q. A coffee cup calorimeter is used to determine ∆H for the following neutralization reaction:KOH(aq) + HCl(aq) → H2O(l) + KCl(aq)When 100. mL of 0.50...

Solved • Nov 29, 2019

Calorimetry

Q. When 2.060 g of titanium (molar mass = 47.87 g mol−1) is combusted in a bomb calorimeter, the temperature of the calorimeter increases from 25.00°C...

Solved • Nov 29, 2019

Calorimetry

Q. If 100. J of heat energy are added to separate 50.0 g samples of gold (specific heat = 0.129 J g−1 °C−1), silver (specific heat = 0.234 J g−1 °C−1)...

Solved • Nov 29, 2019

Calorimetry

Q. What is the specific heat capacity of graphite if it requires 266 J to raise the temperature of 15 grams of graphite by 25°C?A. 1.4 J/g°CB. 0.71 J/...

Solved • Nov 21, 2019

Calorimetry

Q. Which of the following substances (with specific heat capacity provided) would show the greatest temperature change upon absorbing 100.0 J of heat?...

Solved • Oct 25, 2019

Calorimetry

Q. A 100.0-mL sample of 0.662 M KOH is mixed with a 100.0-mL sample of 0.662 M HNO3 in a coffee cup calorimeter. If both solutions were initially at 3...

Solved • Oct 25, 2019

Calorimetry

Q. It takes 11.2 kJ of energy to raise the temperature of 145 g of benzene from 23.0°C to 68.0°C. What is the specific heat capacity of benzene? A) 5....

Solved • Oct 25, 2019

Calorimetry

Q. A piece of metal weighing 57.3 g is heated to a temperature of 88.0°C and is then immersed in 155 g of water at a temperature of 21.53°C. After equ...

Solved • Oct 25, 2019

Calorimetry

Q. When 0.455 g of anthracene, C14H10 (molar mass = 178.23 g/mol) is combusted in a bomb calorimeter that has a water jacket containing 500.0 g of wat...

Solved • Oct 25, 2019

Calorimetry

Q. A calorimeter has 1 kg of water (heat capacity of H2O = 4.184 J/g°C) and its heat capacity is 0.10 kJ/°C when it’s empty. The calorimeter increases...

Solved • Oct 9, 2019

Calorimetry

Q. If 266 J are required to increase the temperature of 15 g of graphite by 25°C, what is graphite’s specific heat capacity?A. 0.71 J/g°C B. 0.85 J/g°...

Solved • Oct 9, 2019

Calorimetry

Q. ΔH = ΔE when:A. 2NH3(g) goes from 225 °C to 120 °C at constant pressure. B. Liquid water goes to water vapor at some temperature and pressure C. 2 ...

Solved • Oct 9, 2019

Calorimetry

Q. When 0.550 g of C14H10 (molar mass = 178.22 g mol –1 ) is combusted in a bomb calorimeter that has a water jacket containing 400. g of water, the t...

Solved • Oct 4, 2019

Calorimetry

Q. It takes 11.2 kJ of energy to raise the temperature of 145 g of unknown substance X from 25.0 °C to 70.0 °C. What is the specific heat of X (J g–1 ...

Solved • Oct 4, 2019

Calorimetry

Q. A 30.0 mL of pure water at 280. °C is mixed with 50.0 mL of pure water at 330. °C. What is the final temperature of the mixture (density of water =...

Solved • Oct 3, 2019

Calorimetry

Q. What is the enthalpy change (in kJ) of a chemical reaction that raises the temperature of 250.0 ml of solution having a density of 1.25 g/ml by 7.8...

Solved • Sep 24, 2019

Calorimetry

Q. A piece of iron of mass 200 g and temperature 300°C is dropped into 1.00 kg of water of temperature 20°C. Predict the final equilibrium temperature...

Solved • Aug 7, 2019

Calorimetry

Q. How much heat (kJ) is needed to raise the temperature of 100.0 grams of water from 25.0°C to 50.0°C?

Solved • Aug 7, 2019

Calorimetry

Q. Which of the following (with specific heat capacity provided) would show the smallest temperature change upon gaining 200.0 J of heat?a. 50.0 g Al,...

Solved • Aug 6, 2019

Calorimetry

Q. A piece of iron (C = 0.449 J/g°C) and a piece of gold (C = 0.128 J/g°C) have identical masses. If the iron has an initial temperature of 498 K and ...

Solved • Aug 6, 2019

Calorimetry

Q. Spilling room-temperature water over your skin on a hot day will cool you down. Spilling vegetable oil (of the same temperature as the water) over ...

Solved • Nov 27, 2018

Calorimetry

Q. Two substances, lead and glass (Pyrex), initially at different temperatures, come into contact and reach thermal equilibrium. The mass of lead is 1...

Solved • Nov 12, 2018

Calorimetry

Q. A 4.96 g sample of gold, initially at 62.6˚C, is submerged into 55.1 g of ethanol at 20.1˚C in an insulated container. What is the final temperatur...

Solved • Nov 12, 2018

Calorimetry

Q. A propane tank on a home barbeque contains 11.3x103 g of propane. Use the value for ΔHrxn provided in the text to calculate the total amount of hea...

Solved • Nov 12, 2018

Calorimetry

Q. SubstanceSpecific heatcapacity, Cs (J/(g oC))*ElementsLead0.128Gold0.128Silver0.235Copper0.385Iron0.449Aluminum0.903CompoundsEthanol2.42Water4.18Ma...

Solved • Nov 12, 2018

Calorimetry

Q. You may want to reference (Pages 265 - 266) Section 6.5 while completing this problem.The combustion of toluene has a ΔErxnDelta {{E}_{{ m{{ m rxn}...

Solved • Nov 12, 2018

Calorimetry

Q. To determine whether a shiny gold-colored rock is actually gold, a chemistry student decides to measure its heat capacity. She first weighs the roc...

Solved • Nov 12, 2018

Calorimetry

Q. To determine whether a shiny gold-colored rock is actually gold, a chemistry student decides to measure its heat capacity. She first weighs the roc...

Solved • Nov 12, 2018

Calorimetry

Q. To determine whether a shiny gold-colored rock is actually gold, a chemistry student decides to measure its heat capacity. She first weighs the roc...

Solved • Nov 12, 2018

Calorimetry

Q. A block of copper of unknown mass has an initial temperature of 65.1 oC. The copper is immersed in a beaker containing 95.1 g of water at 22.8 oC. ...

Solved • Nov 12, 2018

Calorimetry

Q. If 55.0 mL of ethanol (density = 0.789 g/mL) initially at 8.0˚C is mixed with 55.0 mL of water (density = 1.0 g/mL) initially at 28.5˚C in an insul...

Solved • Nov 12, 2018

Calorimetry

Q. An unknown mass of each substance, initially at 24.0˚C, absorbs 1950 J of heat. The final temperature is recorded. Find the mass of each substance:...

Solved • Nov 12, 2018

Calorimetry

Q. An unknown mass of each substance, initially at 24.0˚C, absorbs 1950 J of heat. The final temperature is recorded. Find the mass of each substance:...

Solved • Nov 12, 2018

Calorimetry

Q. An unknown mass of each substance, initially at 24.0˚C, absorbs 1950 J of heat. The final temperature is recorded. Find the mass of each substance:...

Solved • Nov 12, 2018

Calorimetry

Q. An unknown mass of each substance, initially at 24.0˚C, absorbs 1950 J of heat. The final temperature is recorded. Find the mass of each substance:...

Solved • Nov 12, 2018

Calorimetry

Q. When 1.551 g of liquid hexane (C6H14) undergoes combustion in a bomb calorimeter, the temperature rises from 25.76 oC to 38.51 oC. Find ∆Erxn for t...

Solved • Nov 12, 2018

Calorimetry

Q. How much heat is required to warm 1.50 kg of sand from 26.0 oC to 100.0 oC?        

Solved • Nov 12, 2018

Calorimetry

Q. A 2.51 g lead weight, initially at 10.6˚C, is submerged in 7.86 g of water at 52.4˚C in an insulated container. What is the final temperature of bo...

Solved • Nov 12, 2018

Calorimetry

Q. When 0.515 g of biphenyl (C12H10) undergoes combustion in a bomb calorimeter, the temperature rises from 25.9°C to 30.0°C. Find ΔErxn for the combu...

Solved • Nov 12, 2018

Calorimetry

Q. Mothballs are composed primarily of the hydrocarbon naphthalene (C10H8). When 1.025 g of naphthalene is burned in a bomb calorimeter, the temperatu...

Solved • Nov 12, 2018

Calorimetry

Q. A copper cube with an edge measuring 1.57 cm and an aluminum cube with an edge measuring 1.66 cm are both heated to 57.6 oC and submerged in 100.0 ...

Solved • Nov 12, 2018

Calorimetry

Q. When a 3.80-g sample of liquid octane (C8H18) is burned in a bomb calorimeter, the temperature of the calorimeter rises by 27.1 °C. The heat capaci...

Solved • Nov 12, 2018

Calorimetry

Q. Two substances, A and B, of equal mass but at different temperatures come into thermal contact. The specific heat capacity of substance A is twice ...

Solved • Nov 12, 2018

Calorimetry

Q. Dry ice is solid carbon dioxide. Instead of melting, solid carbon dioxide sublimes according to the equation: CO2(s) → CO2(g). When dry ice is adde...

Solved • Nov 12, 2018

Calorimetry

Q. The same reaction, with exactly the same amount of reactant, is conducted in a bomb calorimeter and in a coffee-cup calorimeter. In one of the calo...

Solved • Nov 12, 2018

Calorimetry

Q. We pack two identical coolers for a picnic, placing 24 12-ounce soft drinks and five pounds of ice in each. However, the drinks that we put into co...

Solved • Nov 12, 2018

Calorimetry

Q. Substances A and B, initially at different temperatures, come in contact with each other and reach thermal equilibrium. The mass of substance A is ...

Solved • Nov 12, 2018

Calorimetry

Q. A 1-kg cylinder of aluminum and 1-kg jug of water, both at room temperature, are put into a refrigerator. After one hour, the temperature of each o...

Solved • Nov 12, 2018

Calorimetry

Q. A 1-kg cylinder of aluminum and 1-kg jug of water, both at room temperature, are put into a refrigerator. After one hour, the temperature of each o...

Solved • Nov 12, 2018

Calorimetry

Q. Two substances A and B, initially at different temperatures, are thermally isolated from their surroundings and allowed to come into thermal contac...

Solved • Nov 12, 2018

Calorimetry

Q. Which sample is most likely to undergo the smallest change in temperature upon the absorption of 100 kJ of heat?a) 15 g waterb) 15 g leadc) 50 g wa...

Solved • Nov 12, 2018

Calorimetry

Q. How much heat must be absorbed by a 21.0 g sample of water to raise its temperature from 21.0 oC to 51.0 oC? (For water, Cs =4.18 J/g oC.)

Solved • Nov 12, 2018

Calorimetry

Q. A 13.0 g sample of granite initially at 82.0 oC is immersed into 26.0 g of water initially at 23.0 oC. What is the final temperature of both substa...

Solved • Nov 12, 2018

Calorimetry

Q. The heat of vaporization of water at 373 K is 40.7 kJ/mol.Find q for the evaporation of 451 g of water at this temperature.

Solved • Nov 12, 2018

Calorimetry

Q. The heat of vaporization of water at 373 K is 40.7 kJ/mol. Find ΔE for the evaporation of 451 g of water at this temperature.

Solved • Nov 12, 2018