An unknown sample of coal is burned in an apparatus with a calorimeter constant of 1.09 kJ/°C. When a 0.219-g sample is used, the temperature change is 8.46°C. What is the energy density of the sample in kJ/g?   Round your answer to 2 decimal places.

Q: One tablespoon of cookie dough has a mass of 14.69 g. It is combusted in a calorimeter whose heat…

A: q = m. C. ∆T  q = heat in joules  m = mass in grams  ∆T = Tf - Ti = final temperature - initial…

Q: An unknown sample of coal is burned in an apparatus with a calorimeter constant of 2.44 kJ/°C. When…

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Q: An unknown sample of coal is burned in an apparatus with a calorimeter constant of 0.96 kJ/°C. When…

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Q: A 48.4-g sample of an unknown metal at 100.0 °C is placed in a constant-pressure calorimeter…

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Q: An unknown sample of coal is burned in an apparatus with a calorimeter constant of 1.49 kJ/°C. When…

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Q: One piece of copper jewelry at 105oC has twice the mass of another piece at 45oC. Both are placed in…

A: The heat lost (or) heat gained could given by expression is, q=mc∆T

Q: When a particular gas expands against a constant external pressure of 1.00 bar, it does 5 J of work…

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Q: An unknown sample of coal is burned in an apparatus with a calorimeter constant of 1.86 kJ/°C. When…

A: Consider the given information is as follows; Mass of sample = 0.406 g Calorimeter constant…

Q: An unknown sample of coal is burned in an apparatus with a calorimeter constant of 2.44 kJ/°C. When…

A: The value of the calorimeter constant is = 2.44 kJ/°C The mass of the sample is = 0.281 g The…

Q: A bomb calorimeter has a heat capacity of 6.47 kJ/K. When a 0.107-g sample of ethylene (C2H4) was…

A: Heat of combustion is the heat produced when a molecule is combusted in air and produces water and…

Q: Mothballs are composed primarily of the hydrocarbon naphthalene (C10H8) When 1.025 g of naphthalene…

A: Bomb calorimeter:Bomb calorimeter is used to measure a change in internal energy of the system in a…

Q: When 30 mL of 1.0 M HCl was mixed with 50 mL of 1.0 M NaOH in a coffee cup calorimeter, the…

A: Recall the following relation to calculate amount of heat(Q) gained by water…

Q: 8. (Calorimetry - Determination of specific heat) A 5.1-gram piece of gold jewelry is removed from…

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Q: 1. How much energy is required to raise the temperature of 37.8 g of silver from 19.2°C to 63.5°C?

A: Solution 1:- In order to be able to determine how much heat is required to increase the temperature…

Q: A chemical reaction in a bomb calorimeter evolves 3.15 kJ of heat. If the temperature of the…

A: From given data q = 3.15 kJ = 3150 J  T1= 19.19°C = 292.19 K T2= 22.03°C = 295.03 K  Formula used…

Q: Your favorite snack undoubtedly has a nutrition label that indicates the total number of calories…

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Q: One tablespoon of cookie dough has a mass of 13.02 g13.02 g. It is combusted in a calorimeter whose…

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Q: bomb calorimeter has a heat capacity of 2.47 kJ/K. When a 0.111-g sample of ethylene (C2H4) was…

A: Calculate the heat energy gained by calorimeter.

Q: The combustion of 0.1595 g benzoic acid increases the temperature of a bomb calorimeter by 2.52°C.…

A: Given data is as follows: Mass of benzoic acid is 0.1595 g Energy released by benzoic acid is 26.42…

Q: a calorimetry experiment, a 22.5 gram metal object was heated to 64.23oC. It was placed into a…

A: Mass of metal = 22.5 g Temperature(T1) = 64.23 °c Mass of water = 30.0 g Temperature = 23.98 °c…

Q: Four different substance each have identical masses. The specific heat capacities of these four…

A: The quantity of heat required to alter the temperature of a unit mass of a substance by one degree…

Q: 13. In an experiment, 30.0 g of metal was heated to 98.0°C and then quickly transferred to 50.0 g of…

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Q: A piece of aluminum (which has a specific capacity of 0.891 J/"C-g} is heated to 82.4°C and dropped…

A: It is given that aluminium has an initial temperature of 82.4°C and is dropped in 76.1 g of water…

Q: The combustion of 0.1558 g benzoic acid increases the temperature of a bomb calorimeter by 2.51°C.…

A: The amount of heat released (or absorbed) by 1 grams of a substance to change its temperature by 1oC…

Q: Enter your answer in the provided box. One piece of copper jewelry at 107°C has exactly twice the…

A: CALORIMETRY To determine that whether the heat is lost or gained in a system, the calorimetry method…

Q: Enter your answer in the provided box. One piece of copper jewelry at 125°C has exactly twice the…

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Q: The combustion of 0.1564 g benzoic acid increases the temperature of a bomb calorimeter by 2.53°C.…

A: Since the energy released by the combustion of benzoic acid is 26.42 KJ/g, therefore the energy…

Q: When 30 mL of 1.0M HCl was mixed with 50 mL of 1.0 M NaOH in a coffee cup calorimeter, the…

A: Given : Concentration of NaOH = 1.0 M Concentration of HCl = 1.0 M Volume of NaOH solution = 50 mL =…

Q: 5.037g piece of iron is heated to 100°c and placed in a coffee cup calorimeter that initially…

A: As we know, Heat(q) = ms.□T where, m = mass of substance   s = specific heat capacity  □T =…

Q: One tablespoon of cookie dough has a mass of 12.50 g12.50 g. It is combusted in a calorimeter whose…

A: The energy released by 12.50 g cookie dough can be calculated by the following formula.…

Q: A 33.58 g stainless steel ball bearing at 117.82°C is placed in a constant-pressure calorimeter…

A: We are given that the weight of stainless steel ball-bearing is 33.58g and its temperature is…

Q: A 100.0 g sample of an unknown metal is heated to 95.00°C. This hot metal is then placed into a foam…

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Q: A coffee cup calorimeter contains water at an initial temperature of 20°C and is calculated to have…

A: A coffee cup calorimeter contains water at an initial temperature of 20°C and  Given data is:…

Q: When 1.0 g of fructose, C,H1206(s), a sugar commonly found in fruits, is burned in oxygen in a bomb…

A: The heat for this combustion is               -15.6 KJ Given, Mass =1.0 g of fructose Temperature…

Q: Nitric oxide gas, NO(g), can be oxidized in air to produce nitrogen dioxide gas, NO,(g): 2 NO(g) +…

A: The reactions given are, 1) O2 (g) → 2 O (g)…

Q: When equal masses of Pb, Al, and Zn, each at room temperature, absorb an equal amount of heat, which…

A: Specific heat (C) :-  The amount of heet needed to rise the temperature of 1 gram of a substance…

Q: With a platinum catalyst, ammonia will burn in oxygen to give nitric oxide, NO. 4NH3 (9) + 502(g) →…

A: Answer: reaction for whom enthalpy change is given is: 4NH3(g)+5O2(g)→4NO(g)+6H2O(g) Now the…

Q: A coffee cup calorimeter contains water at an initial temperature of 20°C and is calculated to have…

A: Specific heat capacity is the amount of heat that is required to rise a temperature of1 kg substance…

Q: A 7.50 g marshmallow is placed in a calorimeter and burned in excess oxygen. The temperature…

A: Specific heat capacity is the amount of heat that is required to raise temperature of 1 kg substance…

Q: An unknown sample of coal is burned in an apparatus with a calorimeter constant of 0.72 kJ/°C. When…

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Q: 50.0 g sample of copper is at 25 °C. If 1200 J of energy is added to the copper by heat, what is its…

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Q: 1. 50.0 g of water are added to a calorimeter at 22.35°C. An additional 50.0 g of water are heated…

A: 1. The energy difference of the heat energy gained by cold water and the heat energy lost by hot…

Q: An unknown sample of coal is burned in an apparatus with a calorimeter constant of 0.73 kj/°C. When…

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Q: 2 NO(g) + O2(g) ––––> 2 NO2(g); ∆H° = –114.4 kJ Given the thermochemical equation above, how much…

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Q: A coffee-cup calorimeter contains 30 mL of water with an initial temperature of 24.8°C. An unknown…

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Q: A sample of water in a constant pressure calorimeter has a temperature of 23.4 ̊C. (You may assume…

A: Given that: Temperature of water = 23.4°C Mass of aluminium = 28.6 g Temperature of aluminium =…

Q: When a 0.740-g sample of trinitrotoluene (TNT), C,H,N‚O§, is burned in a bomb calorimeter, the…

A: Mass given = 0.740 g  Heat capacity = 3.35 KJ°C-  Initial Temperature = 23.4 °C  Final temperature =…

Q: A 1.69 gram sample is heated to an initial temperature of 75 oC. The sample is then placed in a…

A: Mass of sample = 1.69g Mass of water = 542g Initial temperature of water = 20°C Final temperature if…

Q: An 87.9 g sample of chromium metal at 99.1°C is placed in a calorimeter containing 100.00 g of water…

A: a) Since the metal is losing heat as the temperature of the metal is going down from 99.1 °C to 25.7…