An unknown sample of coal is burned in an apparatus with a calorimeter constant of 1.86 kJ/°C. When a 0.406-g sample is used, the temperature change is 9.1°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…

A:

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

A:

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

A:

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

A:

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: The energy content of food is typically determined using a bomb calorimeter. Consider the combustion…

A: Since Q = CΔT  where Q = heat  C = heat capacity = 2.67 kJ/°C ΔT = change in temperature = 26.1 -…

Q: 3. Given that: 2CH;OH (I) + 302 (g) → 2CO2 (g) + 4H2O (I) AH = -1452 kJ A 2.00 g sample of methanol,…

A:

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: 2CH;OH (I) + 302 (g) → 2CO2 (g) + 4H2O (I) AH = -1452 kJ A 2.00 g sample of methanol, CH;OH, is…

A: The reaction given is, Given: mass of methanol burned = 2.00 g. Mass of water = 500 g. Heat…

Q: The combustion of 0.1583 g benzoic acid increases the temperature of a bomb calorimeter by 2.52°C.…

A:

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: 23.12-gram metal bar sample at 76.21 °C is placed in a constant- pressure calorimeter containing…

A: In this problem the specific heat of metal bar is to find.

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…

A:

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

A:

Q: An unknown sample of coal is burned in an apparatus with a calorimeter constant of 1.09 kJ/°C. When…

A:

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: 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: The heat of combustion of glucose (C 6 H 12 0 6) is 2.82 x 10 kJ/mol. If a 1.25 g sample of glucose…

A: Option 6.21 kJ/oC is answer

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: 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: 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: One piece of gold jewelry at 130°C has twice the mass of another piece at 45°C. Both are placed in a…

A: Please find your solution below :

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…

A:

Q: A calorimeter was filled with 50 g of water with an initial temperature of 10 °C then hot water…

A: Heat capacity of water = 4.184 J/(g. °C) Mass of cold water at 10 °C = 50 g Mass of hot water at 99…

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: 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: 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:

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 1.62 kJ/°C. When…

A:

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

A:

Q: Under constant-volume conditions, the heat of combustion of benzoic acid is 26.38 KJ/g. A 2.760-g…

A: The heat of combustion per gram of the new substances is calculated in step two.

Q: One tablespoon of cookie dough has a mass of 15.85 g. It is combusted in a calorimeter whose heat…

A: 1 Joule = 1/4184 cal  Or 1 KJ = 1000/4184 cal

Q: A 12.18 g sample of a shiny, orange-brown metal is heated to 65.0oC then added to 25.0 g of water in…

A: The initial temperature of metal is decreased after adding into  water in a coffee-cup calorimeter.…

Q: The combustion of 0.1566 g benzoic acid increases the temperature of a bomb calorimeter by 2.51°C.…

A: Heat loss by benzoic acid is equal to the heat gain by calorimeter. Qcalorimeter=-Qbenzoic acid Heat…

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

A:

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

A:

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…