A group of first year engineering students performed a firsthand investigation to find the heat of combustion of ethyl alcohol. They burned ethanol in an alcohol lamp and used it to heat 100 mL of water.  They obtained the following results: Initial mass of alcohol lamp with ethanol= 50.9g Final mass of alcohol lamp with ethanol= 49g Initial Temperature of water= 31.4 degrees Celsius Final Temperature of water= 35.3 degrees Celsius Calculate the molar heat of combustion of ethanol(J/mol), rounded to the second decimal place, using the results gathered. (The specific heat of water is 4.184 J/g∘∘C.).

Q: Determine the enthalpy change when 150g of 10˚C water was placed into a calorimeter. 90g of sulfuric…

A: The heat absorbed by the solution can be calculated as: q=mc∆Tm = mass of solutionc = specific heat…

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A: The amount of heat required to increase the temperature of one kilo gram of a substance by one…

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Q: In this experiment you will place a sample of your FeCl2 in water in a constant pressure calorimeter…

A: Heat is a form of energy that is exchanged between various temperature environments or objects…

Q: 39.0 g sample of a metal is heated to 63.0 °C and then dropped into 125.0 g of water in a…

A: Heat absorbed by the substance = m x Cs x ∆T  m = mass of substance Cs = specific heat capacity of…

Q: 2. Acetylene, C2H2, is used in welding torches. It releases a lot of energy when burned in oxygen.…

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Q: A new metal alloy was created in the laboratory for use in applications where a strong but light…

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Q: piece of metal with a mass of 20.8 g is heated to 99.5°C and then dropped into an ideal "no-leak"…

A: Given that:  Mass of metal(m) = 20.8g  Initial temperature of metal(T1) = 99.5°C Mass of water(m) =…

Q: Under Measurements show that the enthalpy of a mixture of gaseous reactants increases by 206. kJ…

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Q: 4. A 5.00 gram sample of an unknown metal was placed in a beaker of boiling water (99.58 °C). After…

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Q: 1. Melted methane was ignited and used to heat water in a thin metal container. After a short period…

A: Enthalpy of combustion is defined as the amount of heat released by burning of one mole of compound.

Q: 5. A piece of metal weighing 59.047 g was heated to 100.0 °C and then put it into 100.0 mL of water…

A: Mass of metal =59.047 g Mass of water = 100g ( density of water is1g/ml)

Q: In the laboratory a student burns a 1.13-g sample of dimethyl oxalate (C,H,04) in a bomb calorimeter…

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Q: In a coffee-cup calorimeter, 120.0 mL of 1.4 M NaOH and 120.0 mL of 1.4 M HCl are mixed. Both…

A: Volume of 1.4 M NaOH taken, V = 120.0 mL Volume of 1.4 M HCl taken, V = 120 mL

Q: If the energy change for a system is equal to the mass of the substance x the change in temperature…

A: Specific heat is the amount of heat needed for one gram of a substance to increase its temperature…

Q: A 31.55 g iron rod, initially at 22.7 °C, is submerged into an unknown mass of water at 63.2 °C, in…

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Q: heat sample A bomb calorimeter, or constant volume calorimeter, is a device often used to determine…

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Q: You want to determine the heat capacity of an unknown metal sample in order to help identify it. To…

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Q: A 65.4 g piece of metal that had been submerged in boiling water (100 °C) was quickly transferred…

A: Mass of water, m = 93.0 mL x 1gmL= 93.0 g  Specific heat of water, s = 4.184 J/g °C Change in…

Q: In an experiment to find the heat capacity of your coffee-cup calorimeter, you pour 75.0 mL of hot…

A: We can use the equation: q = mCΔT where q is the heat absorbed or released, m is the mass of the…

Q: 40.036 g of a metal is heated to 99.6 °C and is then placed into 25.0 g of water at 22.4 °C. The…

A: Given: Mass of metal = 40.036 gTemperature of metal = 99.6 °CMass of water = 25.0 gTemperature of…

Q: I'm not sure which of these options is the maximum stable temperature? could you explain I just want…

A: Solution Specific heat capacity of a substance is described as the amount of  heat energy required…

Q: wires heat sample Water Stirrer nud Sample buming Steel sample outside chamber In an experiment, a…

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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 2.62E1 g sample of aluminum at 1.008E2 °C is added to 1.002E2 g of water at 2.22E1 °C in a…

A: For a chemical reaction or physical process to occur a certain amount of energy should be furnished…

Q: A gas is expanding against a constant pressure of 3 atm from a pressure of 18.0 to 23.0 L and…

A: Here we are required to find the change in the internal energy of the system.

Q: The specific heat capacity of a pure substance can be found by dividing the heat needed to change…

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Q: Specific Heat Capacity A 24.5-g sample of an unknown metal is heated to 97.5°C and is placed in a…

A: Given that: Mass of metal = 24.5 g  Initial temperature of metal = 97.5°C Mass of water = 164 g…

Q: 1. In an experiment to determine the Specific Heat of Nickel, a 66.0 g sample of Nickel metal is…

A: Answer :-  The specific heat of Nickel determined by the experiment = 0.544 J/g.°C…

Q: A metal object with mass of 24.9 g is heated to 97.0 ∘C and then transferred to an insulated…

A: Heat = mass of substance X specific heat X temperature change

Q: An 8.50 L sample of an ideal gas at 25° C undergoes a change at a pressure of 1.90 x 103 torr while…

A: Volume of sample of gas = 8.50 L

Q: section in your e Text. Two substances, A and B, initially at different temperatures, come into…

A: we have to calculate the specific heat capacity of substance A

Q: A gas is compressed from an initial volume of 5.65 L to a final volume of 1.23 L by an external…

A: Thermodynamic is the branch of chemistry that mainly deals with the heat transfer between system and…

Q: A certain chemical reaction releases 3.45 kJ of heat energy per mole of reactant consumed. Suppose…

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Q: You just got a job teaching chemistry at a local community college. Your new boss wants you to…

A: Given: Temperature change = 4.00 oC Mass of the solution = 85.0 g

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: Having just invented a new type of calorimeter, Dr. Cox needs to determine the heat capacity of the…

A: The mass of water = 32.502 g Temperature of empty calorimeter =25∘C Added water at temperature =…

Q: A gaseous fuel mixture contains 24.2% methane (CH4), 40.5% ethane (C₂H6) and the rest propane (C3H8)…

A: Given, Methane (CH4) = 24.2 %Ethane (C2H6) = 40.5 %Propane (C3H8)=35.3 %

Q: In a coffee-cup calorimeter, 100.0 mL of 1.3 M NaOH and 100.0 mL of 1.3 M HCl are mixed. Both…

A: Given : Concentration of NaOH = 1.3 MConcentration of HCl = 1.3 MVolume of NaOH solution = 100.0 mL…

Q: An experiment was performed to calculate the heat of solution for potassium fluoride. Use the…

A: Given: The mass of water=52.42 g The mass of salt sample=7.32 g The total mass of the sample,…

Q: A chemist carefully measures the amount of heat needed to raise the temperature of a 854.0 mg sample…

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Q: A spirit burner used 1.00 g methanol to raise the temperature of 100.0 g water In a metal can from…

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Q: 4. A 505 gram piece of copper tubing is heated to 99.0 °C and placed in an insulated vessel…

A: Heat capacity: The amount of heat required to increase the temperature of a substance by one-degree…

Q: A 45.90 g sample of pure copper is heated in a test tube to 99.40°C. The copper sample is then…

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Q: 100.0 mL of cold water at 20.5 oC was poured into a styrofoam coffee cup calorimeter. After adding…

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