An 87.0-g piece of iron whose temperature is 73.8 °C (347.0 K) is placed in a beaker containing 300 g of water at 18.6 °C (291.8 K). When thermal equilibrium is reached, what is the final temperature? (Assume no energy is lost to warm the beaker and its surroundings.) The specific heat of iron is 0.449 J/g∙K, and the specific heat of water is 4.184 J/g∙K. K

Q: A 110.0-g sample of a gray-colored, unknown, pure metal was heated to 92.0 oC and put into a…

A: Assuming specific heat of metal is C. Since all the heat released by metal in reaching the final…

Q: 55.0 g of NaOh is added to a coffee cup calorimeter containing 812 mL of 1.10 M Hbr, changing the…

A: Given information,Mass of NaOH is 55.0 g.Volume of HBr is 812 mL and concentration is 1.10…

Q: Sodium chloride is added in cooking to enhance the flavor of food.  When 10.0 g of NaCl is…

A: Given that 669 J of heat is absorbed. q = +669 JAs heat is absorbed in the reaction from water in…

Q: A 140.0 g sample of water at 25.0C is mixed with 114.0 g of a certain metal at 100.0 °C. After…

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Q: calorimeter containing 837 mL of 1.10 M acid, where the acid has a 1 to 1 molar ratio with sodium…

A: We will calculate ∆H in Kj/mol

Q: A 115.0-g sample of a metal at 165.0 °C is added to 265.0 g of ethylene glycol (specific heat = 2.43…

A:

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: coffee-cup calorimeter, 120.0 mL of 1.4 M NaOH and 120.0 mL of 1.4 M HCl are mixed. Therefore, Total…

Q: 5.2 g of NaOH is added to a coffee cup calorimeter containing 861 mL of 1.10 M acid, where the acid…

A: Given molarity of acid = 1.10 M  Volume = 861 mL  Density of the solution = Density of water = 1.0…

Q: A 13.8 g piece of nickel was heated to 97.5 °C in boiling water and then dropped into a beaker…

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Q: 3.24 g of a piece of a metal is initially at 83.0°C. It is dropped into a coffee cup calorimeter…

A: Recall the following expression according to Law of calorimetry       Q=m×C×∆t Mass of metal=3.24…

Q: A 7.37 g sample of an unknown salt (MM = 116.82 g/mol) is dissolved in 150.00 g water in a coffee…

A: Given, Mass of sample = 7.37 gMass of water = 150 g Mass of solution = 157.37 g Initial temperature…

Q: A coffee cup calorimeter, including that water it contains, has a heat capacity of 425 J/K, and is…

A:

Q: A 479.00 sample of an unknown metal at 96.75°C is placed in a calorimeter containing 139.00 mL of…

A: Given: Mass of an unknown metal = 479 g Volume of water = 139 mL Density of water = 1 g/mL Mass of…

Q: When 108 g of water at a temperature of 23.1 °C is mixed with 66.1 g of water at an unknown…

A:

Q: A 31.74-g lead (Pb) sample at 71.58°C is placed in a constant-pressure calorimeter of negligible…

A: Given, A 31.74-g lead (Pb) sample at 71.58°C is placed in a constant-pressure calorimeter of…

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…

A:

Q: 5) A 120.0-g piece of metal at 60.0 °C is placed in 150 g of water at 19.0 °C contained in a…

A: Calculating the heat released or absorbed for the process:            ......(1) In a system, the…

Q: A 85 g rock is heated to 98.7°C and placed into 125.3 g of water originally at 30.0°C . If the final…

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Q: A 4.77 g sample of an unknown salt (MM = 116.82 g/mol) is dissolved in 150.00 g water in a coffee…

A:

Q: A 50.0 g sample of unknown metal at 230.0°C is placed in a calorimeter containing 110 g of water at…

A: Heat capacity of calorimeter= 8.2J/g-°cTemperature difference ∆T = 19.3  - 15 = 4.3 °c

Q: A 4.81 g sample of an unknown salt (MM = 116.82 g/mol) is dissolved in 150.00 g water in a coffee…

A: Given, Mass of unknown sample ,ms=4.81 g  mass of water, mw= 150 g initial temperature Ti=23.72°C…

Q: A piece of unknown metal with a mass of 18.01 g is heated in boiling water to 98.9°C and then…

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Q: Given that 154.81 g of solution increased in temperature by 4.82 °C, how much heat, in J, was gained…

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Q: In a calorimetric analysis, 2.42 g of potassium chloride is weighed. The heat of solution of this…

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Q: In a coffee-cup calorimeter, 130.0 mL of 1.0 M  NaOH and 130.0 mL of 1.0 M  HCI are mixed. Both…

A: Q = m . s . (T2 - T1) DeltaH = Q/Number of mols of HCl or NaOH

Q: If 0.066 mol of hydrochloric acid (HCl)  is mixed with 0.066 mol of sodium hydroxide (NaOH)  in a…

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Q: When a 43.0 g sample of metal at 100.0 oC is added to 38.0 g of water at 23.72 oC, the final…

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Q: During an experiment, 25 g of 0.32 M Ca(NO3)2 at 42°C is added to 103 g of 0.82 M HNO3 at 37°C in a…

A: 25 g of 0.32 M Ca(NO3)2 at 42◦ C are mixed with 103 g of 0.82 M HNO3 at 37◦ C . The increase in…

Q: Calculate the heat (q) for 195 grams of pure water heated from a temperature of 25.0 °C to 77.5 °C.…

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Q: In a coffee-cup calorimeter, 110.0 mL of 1.3 M and 110.0 mL of 1.3 M are mixed. Both solutions were…

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Q: A sample of silver metal is heated to 100.1 °C in a hot water bath until thermal equilibrium is…

A: Given that: mass of water = 52.483 g initial temperature of metal  = 100.1 °C final temperature of…

Q: 150. g of water (Cs = 4.184 J/g°C) at 20.0 °C is added to a coffee cup calorimeter. A 35.0 g sample…

A: We use conservation of heat law in order to achieve equilibrium :- -Heat released by the solid =…

Q: A piece of unknown metal with a mass of 15.24 g is heated in boiling water to 96.17°C and then…

A:

Q: A 6.55 g sample of an unknown salt (MM = 116.82 g/mol) is dissolved in 150.00 g water in a coffee…

A: The total mass of a solution is the summation of the mass of solute and the mass of solvent. The…

Q: A 28.602 g sample of a metal is heated to 99.9°C in a hot water bath until thermal equilibrium is…

A: Let c be the specific heat of the metal Heat lost by the metal = mass x specific heat x temperature…

Q: A 29.00 g sample of metal alloy is heated to 92.6 °C; then placed in 55.23 g of water in an…

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Q: A 5.71 g sample of an unknown salt (MM = 116.82 g/mol) is dissolved in 150.00 g water in a coffee…

A: Mass of unknown salt dissolved in 150.00 g of water = 5.71 g Molar mass of the salt  = 116.82 g/mol…