The heat of solution of a solid sample was determined using a coffee cup calorimeter that contains 250 milliliters of water initially at 25°C. As the sample is dissolved in the water, the temperature of the water decreased to 11°C. What is the heat of solution of the sample? Assume that the density of water is 1.00 g/ml and that the coffee cup is a good insulator.   How much heat is released by a 96 gram piece of copper as it cools from 450°C to 48°C.

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Q: A coffee-cup calorimeter having a heat capacity of 472 J/°C is used to measure the heat evolved when…

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A: Given: Mass of water = 50.0 g. Initial temperature of water = 25.00 oC Mass of NaNO3 = 5.00 g. Heat…

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Q: When 0.378 g of sodium metal is added to an excess of hydrochloric acid, 3930 J of heat are…

A: Given-> Weight of Na = 0.378 g Heat produced for 0.378 g = 3930 J  (1 KJ = 1000 J)

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A: A hot pack and cold pack are example of what and what reaction work by hot pack and cold given…

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A: Given information: Mass of water = 250 g Initial temperature (Ti) = 22 oC Final temperature (Tf) =…

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Q: The standard heat of formation, ΔH∘fΔHf∘, is defined as the enthalpy change for the formation of one…

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A: The reaction for standard enthalpy of formation of Fe2O3 is depicted by equation.

Q: When 0.238 g of sodium metal is added to an excess of hydrochloric acid, 2470 J of heat are…

A: 2Na(s) + 2 HCl (aq) -->2NaCl(aq) + H2(g) Enthaly of reaction=? Na has molar mass=23 0.238g of…

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Q: Self-heating cans may be used to warm drinks such as coffee. When the button on the can is pushed, a…

A: Consider the given target equation for which we have to determine the enthalpy change is as follows;…

Q: When 0.855 g of sodium metal is added to an excess of hydrochloric acid, 8890 J of heat are…

A: Sodium metal= 0.855gm Energy released = 8890J

Q: A 8.17 g sample of an unknown salt (MM = 116.82 g/mol) is dissolved in 150.00 g water in a coffee…

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Q: For which of the following reactions is ΔH∘rxnΔHrxn∘ equal to ΔH∘fΔHf∘ of the product(s)?You do not…

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Q: When 0.615 g of sodium metal is added to an excess of hydrochloric acid, 6390 J of heat are…

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Q: Suppose that 4.65 grams of X (MW = 25.94) are dissolved in 536 mL of water, and the water…

A: Given a substance X that is dissolved in water. What is the enthalpy of dissolution of X when 4.65g…

Q: Calculate the heat exchanged when 32.0 g oxygen reacts with 16.0 g methane:  CH4(g) + 3/2 O2(g) →…

A: Ans -600kj

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Q: When 13.99mL of HCl of unknown concentration (but less than that of the base) are reacted with…

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A: Enthalpy is a thermodynamic property which is equal to the heat content of the system.

Q: When 0.361 g of sodium metal is added to an excess of hydrochloric acid, 3750 J of heat are…

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Q: 3. The heat of the solution of a solid sample was determined using a coffee cup calorimeter that…

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Q: a. Hydrogen cyanide is used in the manufacture of clear plastics such as Lucite and Plexiglas. It is…

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Q: A chemist dissolved an 10.8-g sample of KOH in 100.0 grams of water in a coffee cup calorimeter.…

A: Here we are required to find the enthalpy of solution of KOH in the unit of kJ/mol

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Q: Given that the enthalpy of neutralization for the reaction of HCl (a strong acid) and NaOH (a strong…

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Q: 5 grams of an unknown compound was dissolved in 75 ml of water with an initial temperature of 22.5°C…

A: Given that: Mass of sample = 5 g The volume of water = 75 mL Initial temprature = 22.5 oC Final…

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Q: 1. 25 g of sodium (Na) is put into 200 mL of water. The reaction between the two produces sodium…

A: Enthalpy change calculated As heat chage(q) of the system.

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A: It is given that 0.070 kg of water is contained in a cup of copper which has a mass of 0.080 kg, and…

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Q: During an experiment, a student calculated the heat of neutralization reaction to be - 52.8 kj/mol.…

A: Please find the attached images for the answer

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Q: 5 grams of an unknown compound was dissolved in 75 ml of water with an initial temperature of 22.5°C…

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Q: Consider the following reaction: 2CH3OH(g)→2 CH4(g) + O2(g) H=+252.8 kJ a. Is this reaction…

A: Since we only answer up to 3 sub-parts, we’ll answer the first 3. Please resubmit the question and…

Q: If 2.36 g of calcium dichloride dissolves in 84.00 g of water in a kalorimeter at a constant…

A: 2.36 g of calcium dichloride dissolves in 84.00 g of water Mass of solution = mass of CaCl2 + mass…

Q: 3

A: According to the equation;

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A: Given the volume of the solution = 303mL Therefore mass of the solution = 303mL ×1g/mL = 303g…

Q: A 5.43 g sample of an unknown salt (MM = 116.82 g/mol) is dissolved in 150.00 g water in a coffee…

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Q: How much heat is liberated at constant pressure if 0.938 g of calcium carbonate reacts with 73.2 mL…

A: Since molar mass of calcium carbonate = 100 g/mol Hence moles of calcium carbonate = mass / molar…