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Calorimetry Solutions Library

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297 solutions

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

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. 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. 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. 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. 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. 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. 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 combustion of liquid octane (C8H18) to carbon dioxide and liquid water at 298 K is -1303 kJ/mol. Find ΔE for this reaction.

Solved • Nov 12, 2018

Calorimetry

Q. Two identical refrigerators are plugged in for the first time. Refrigerator A is empty (except for air) and refrigerator B is filled with jugs of w...

Solved • Nov 12, 2018

Calorimetry

Q. A 26.0 -g aluminum block is warmed to 65.5 oC and plunged into an insulated beaker containing 55.3 g water initially at 22.2 oC. The aluminum and t...

Solved • Nov 12, 2018

Calorimetry

Q. Palmitic acid (C16H32O2) is a dietary fat found in beef and butter. The caloric content of palmitic acid is typical of fats in general. Write balan...

Solved • Nov 12, 2018

Calorimetry

Q. One tablespoon of peanut butter has a mass of 17 g . It is combusted in a calorimeter whose heat capacity is 130 kJ/oC . The temperature of the cal...

Solved • Nov 12, 2018

Calorimetry

Q. Evaporating sweat cools the body because evaporation is an endothermic process: H2O(l) → H2O(g); ΔH˚rxn= + 44.01 kJ. Estimate the mass of water tha...

Solved • Nov 12, 2018

Calorimetry

Q. Exactly 1.5 g of a fuel is burned under conditions of constant pressure and then again under conditions of constant volume. In measurement A the re...

Solved • Nov 12, 2018

Calorimetry

Q. In order to obtain the largest possible amount of heat from a chemical reaction in which there is a large increase in the number of moles of gas, s...

Solved • Nov 12, 2018

Calorimetry

Q. A 31.5 g wafer of pure gold initially at 69.7 oC is submerged into 63.6 g of water at 27.2 oC in an insulated container.What is the final temperatu...

Solved • Nov 12, 2018

Calorimetry

Q. A 2.56 g sample of a substance suspected of being pure gold is warmed to 72.4 oC and submerged into 15.6 g of water initially at 24.6 oC. The fin...

Solved • Nov 12, 2018

Calorimetry

Q. Exactly 1.5 g of a fuel is burned under conditions of constant pressure and then again under conditions of constant volume. In measurement A the re...

Solved • Nov 12, 2018

Calorimetry

Q. A kilogram of aluminum metal and a kilogram of water are each warmed to 75 oC and placed in two identical insulated containers. One hour later, the...

Solved • Nov 12, 2018

Calorimetry

Q. How much heat is required to warm 1.50 L of water from 26.0 oC to 100.0 oC? (Assume a density of 1.0 g/mL for the water.)

Solved • Nov 12, 2018

Calorimetry

Q. Suppose that 26 g of each of the following substances is initially at 28.0 ºC. What is the final temperature of each substance upon absorbing 2.40 ...

Solved • Nov 12, 2018

Calorimetry

Q. What is calorimetry?

Solved • Nov 12, 2018

Calorimetry

Q. Explain the difference between a coffee-cup calorimeter and a bomb calorimeter.

Solved • Nov 12, 2018

Calorimetry

Q. Suppose you are cold-weather camping and decide to heat some objects to bring into your sleeping bag for added warmth. You place a large water jug ...

Solved • Nov 12, 2018

Calorimetry

Q. The automobile fuel called E85 consists of 85% ethanol and 15% gasoline. E85 can be used in so-called flex-fuel vehicles (FFVs), which can use gaso...

Solved • Oct 31, 2018

Calorimetry

Q. A coffee-cup calorimeter contains 150.0 g of water at 25.2 oC . A 123.0-g block of copper metal is heated to 100.4 oC by putting it in a beaker of ...

Solved • Oct 31, 2018

Calorimetry

Q. A 100.0-g bar of gold is heated from 25 oC to 50 oC, during which it absorbs 322 J of heat. Assume the volume of the gold bar remains constant.What...

Solved • Oct 31, 2018

Calorimetry

Q. A 100.0-g bar of gold is heated from 25 oC to 50 oC, during which it absorbs 322 J of heat. Assume the volume of the gold bar remains constant.Base...

Solved • Oct 31, 2018

Calorimetry

Q. Three common hydrocarbons that contain four carbons are listed here, along with their standard enthalpies of formation: Hy...

Solved • Oct 31, 2018

Calorimetry

Q. Methanol (CH3OH) is used as a fuel in race cars.You may want to reference (Pages 187 - 190) Section 5.7 while completing this problem.Write a balan...

Solved • Oct 31, 2018

Calorimetry

Q. Bomb calorimeter.Why is a stirrer used in calorimeters?

Solved • Oct 31, 2018

Calorimetry

Q. The specific heat of octane, C8H18 (l), is 2.22 J/g K.How many J of heat are needed to raise the temperature of 82.0 g of octane from 11.2 oC to 25...

Solved • Oct 31, 2018

Calorimetry

Q. The specific heat of octane, C8H18 (l), is 2.22 J/g K.Which will require more heat, increasing the temperature of 1 mol of C8H18 (l) by a certain a...

Solved • Oct 31, 2018

Calorimetry

Q. Under constant-volume conditions the heat of combustion of benzoic acid (C6H5COOH) is 26.38 kJ/g. A 2.760 -g sample of benzoic acid is burned in a ...

Solved • Oct 31, 2018

Calorimetry

Q. ElementsCompoundsSubstanceSpecific Heat (J/g-K) SubstanceSpecific Heat (J/g-K) N2(g)1.04H2O(l)4.18Al(s)0.90CH4(g)2.20Fe(s)0.45CO2(g)0.84Hg(l)0.14Ca...

Solved • Oct 31, 2018

Calorimetry

Q. If you know the specific heat of copper, what additional information do you need to calculate the heat capacity of a particular piece of copper pipe?

Solved • Oct 31, 2018

Calorimetry

Q. What is the heat capacity of 175 g of liquid water?

Solved • Oct 31, 2018

Calorimetry

Q. How many kJ of heat are needed to raise the temperature of 13.00 kg of liquid water from 24.5 oC to 46.5 oC?

Solved • Oct 31, 2018

Calorimetry

Q. Assume that the kinetic energy of a 1400 kg car moving at 111 km/h is converted entirely into heat.What amount of water in liters could be heated f...

Solved • Oct 25, 2018

Calorimetry

Q. A 3.67-g peanut is burned in a bomb calorimeter containing 1,223 g of water. The temperature of the water increases from 22.01°C to 29.77°C. Calcul...

Solved • Oct 23, 2018

Calorimetry

Q. A swimming pool, 10.0 m by 4.0 m, is filled with water to a depth of 3.0 m at a temperature of 20.2°C. How much energy is required to raise the tem...

Solved • Oct 19, 2018

Calorimetry

Q. Consider the reactionB2H6 (g) + 3O2 (g) → B2O3 (s) + 3H2O (g)            ΔH = -2035 kJCalculate the amount of heat released when 54.0 g of diborane...

Solved • Oct 19, 2018

Calorimetry

Q. Quinone is an important type of molecule that is involved in photosynthesis. The transport of electrons mediated by quinone in certain enzymes allo...

Solved • Oct 19, 2018

Calorimetry

Q. A sample of nickel is heated to 99.8°C and placed in a coffeecup calorimeter containing 150.0 g water at 23.5°C. After the metal cools, the final t...

Solved • Oct 19, 2018

Calorimetry

Q. If a student performs an endothermic reaction in a calorimeter, how does the calculated value of ΔH differ from the actual value if the heat exchan...

Solved • Oct 18, 2018

Calorimetry

Q. Methanol (CH3OH) has also been proposed as an alternative fuel. Calculate the standard enthalpy of combustion per gram of liquid methanol, and comp...

Solved • Oct 18, 2018

Calorimetry

Q. Ethanol (C2H5OH) has been proposed as an alternative fuel. Calculate the standard enthalpy of combustion per gram of liquid ethanol.

Solved • Oct 18, 2018

Calorimetry

Q. Calculate ΔHrxn for each of the following reactions using the data in Appendix 4:4Na (s) + O2 (g) → 2Na2O (s)2Na (s) + 2H2O (l) → 2NaOH (aq) + H2 (...

Solved • Oct 18, 2018

Calorimetry

Q. The combustion of 0.1584 g benzoic acid increases the temperature of a bomb calorimeter by 2.54°C. Calculate the heat capacity of this calorimeter....

Solved • Oct 18, 2018

Calorimetry

Q. The heat capacity of a bomb calorimeter was determined by burning 6.79 g methane (energy of combustion = -802 kJ/mol CH4) in the bomb. The temperat...

Solved • Oct 18, 2018

Calorimetry

Q. One of the components of polluted air is NO. It is formed in the high-temperature environment of internal combustion engines by the following react...

Solved • Oct 17, 2018

Calorimetry

Q. A 5.00-g sample of aluminum pellets (specific heat capacity = 0.89 J/°C ? g) and a 10.00-g sample of iron pellets (specific heat capacity = 0.45 J/...

Solved • Oct 17, 2018

Calorimetry

Q. A 30.0-g sample of water at 280. K is mixed with 50.0 g water at 330. K. Calculate the final temperature of the mixture assuming no heat loss to th...

Solved • Oct 17, 2018

Calorimetry

Q. A 5.00-g sample of one of the substances listed in Table 7‑1 was heated from 25.2°C to 55.1°C, requiring 133 J to do so. Which substance was it?

Solved • Oct 17, 2018

Calorimetry

Q. A 110.-g sample of copper (specific heat capacity = 0.20 J/°C•g) is heated to 82.4°C and then placed in a container of water at 22.3°C. The final t...

Solved • Oct 17, 2018

Calorimetry

Q. A 150.0-g sample of a metal at 75.0°C is added to 150.0 g H2O at 15.0°C. The temperature of the water rises to 18.3°C. Calculate the specific heat ...

Solved • Oct 17, 2018

Calorimetry

Q. A sample of 0.562 g of carbon is burned in oxygen in a bomb calorimeter, producing carbon dioxide. Assume both the reactants and products are under...

Solved • Oct 16, 2018

Calorimetry

Q. Which is the least expensive source of energy in kilojoules per dollar: a box of breakfast cereal that weighs 32 ounces and costs $4.23, or a liter...

Solved • Oct 16, 2018

Calorimetry

Q. When a 0.740 g sample of trinitrotoluene (TNT), C 7H5N2O6, is burned in a bomb calorimeter, the temperature increases from 23.4°C to 26.9°C. The he...

Solved • Oct 16, 2018

Calorimetry

Q. When 1.0 g of fructose, C6H12O6(s), a sugar commonly found in fruits, is burned in oxygen in a bomb calorimeter, the temperature of the calorimeter...

Solved • Oct 16, 2018

Calorimetry

Q. If the 3.21 g of NH 4NO3 in Example 5.6 were dissolved in 100.0 g of water under the same conditions, how much would the temperature change? Explai...

Solved • Oct 16, 2018

Calorimetry

Q. If a reaction produces 1.506 kJ of heat, which is trapped in 30.0 g of water initially at 26.5°C in a calorimeter like that in Figure 5.12, what is...

Solved • Oct 16, 2018

Calorimetry

Q. A 70.0 g piece of metal at 80.0°C is placed in 100 g of water at 22.0°C contained in a calorimeter like that shown in Figure 5.12. The metal and wa...

Solved • Oct 16, 2018

Calorimetry

Q. The temperature of the cooling water as it leaves the hot engine of an automobile is 240°F. After it passes through the radiator it has a temperatu...

Solved • Oct 16, 2018

Calorimetry

Q. A 45 g aluminum spoon (specific heat 0.88 J/g°C) at 24°C is placed in 180 mL (180 g) of coffee at 85°C and the temperature of the two become equal....

Solved • Oct 16, 2018

Calorimetry

Q. How many milliliters of water at 23°C with a density of 1.00 g/mL must be mixed with 180 mL (about 6 oz) of coffee at 95°C so that the resulting co...

Solved • Oct 16, 2018

Calorimetry

Q. An aluminum kettle weighs 1.05 kg.How much heat is required to heat this kettle from 23.0°C to 99.0°C if it contains 1.25 L of water (density of 0....

Solved • Oct 16, 2018

Calorimetry

Q. An aluminum kettle weighs 1.05 kg.What is the heat capacity of the kettle?

Solved • Oct 16, 2018