A particular sample of cold graphite at 10.20 °C was added to 988.5 g of water at 25.31 °C in a constant pressure calorimeter. If the final temperature of the graphite and water was 25.17 °C, what was the mass of the graphite sample? Assume no heat was lost to the surroundings. The specific heat for water is 4.184 J/g•°C and the specific heat for this graphite is 0.7069 J/g•°C.

Q: A certain chemical reaction releases 111.kJ of heat energy per mole of reactant consumed. Suppose…

A: Heat capacity of calorimeter: Ccal = 4.45 J / 1oC = 4.45 J/oC   Heat of calorimeter: q cal  = C cal…

Q: A student mixes 67.0 mL of a 2.01 M sodium hydroxide solution with  23.2 mL of 6.45 M hydrochloric…

A: GivenVolume of NaOH solution = 67.0 mL = 0.067 LMolarity of NaOH solution = 2.01 MMoles of NaOH…

Q: A sample of 23.2 g of ammonium nitrate, NH¼NO3, was dissolved in 137.5 g of water in a coffee cup…

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Q: A calorimeter contained 69.0 g of water at 15.99°C. A 119-g sample of iron at 66.26°C was placed in…

A: Initial temperature of calorimeter will be same as that of water . Heat capacity= mass × specific…

Q: 75.0 g of Ag metal is heated to 80.0 °C and dropped into 50.0 g of water at 23.2 °C. The final…

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Q: A 30.0 g sample of water at 280. K is mixed with 30.0 g of iron at 330 K. The final temperature of…

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Q: A 42.5 gram piece of chromium is heated to a temperature of 98.70ºC. The metal is then dropped into…

A: Mass of chromium = 42.5 g Mass of water = 36.0 g To find final temperature

Q: When 1.3 g of KClO3 was added to 151.1 g of water in a calorimeter, the temperature dropped by 0.588…

A: Given, Mass of KClO3= 1.3g Mass of water= 151.1g Temperature dropped(dT)=0.588°C  The heat capacity…

Q: A chemist is asked to determine the specific heat capacity of an unknown mineral. The 189-g sample…

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Q: A calorimeter contained 65.0 g of water at 16.71°C. A 108-g sample of iron at 64.48°C was placed in…

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Q: A 5.000 g sample of methanol, CH3OH, was combusted in the presence of excess oxygen in a bomb…

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

Q: 1. A sample of metal with mass 250.0 g is heated to 130.0 ℃ and dropped into 425 g of water at 26.0…

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Q: In the laboratory, a "coffee cup" calorimeter, or constant pressure calorimeter, is frequently used…

A: qw = - qTin mw × cw × (Tf - Ti) = - { mtin × ctin × (Tf - Ti) On substituting the values into it, we…

Q: A 28.0−g sample of an unknown metal at 99°C was placed in a constant-pressure calorimeter containing…

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

Q: A sample of nickel is heated to 99.8°C and placed in a coffee-cup calorimeter containing 150.0 g…

A: The equation used to calculate heat released or absorbed follows:        ......(1) where, q = heat…

Q: A 148.9-g sample of a metal at 74.0°C is added to 148.9 g H20 at 14.4°C. The temperature of the…

A:

Q: 1. A 400.0 g sample of methanol at 16.0ºC is mixed with 400.0 g of water at 85.0ºC. Assuming no heat…

A: Here we are required to find the final temperature of the mixture.

Q: A 35.0-g sample of water at 25°C is mixed with 45.0 g of water at 88°C. Calculate the final…

A: Calculate for the final temperature of the mixture see step-2 for further Calculation and concept…

Q: A chunk of metal having a mass of 49.7g was warmed to 95.5°C and then dropped into a calorimeter…

A: Mass of metal = 49.7g  Mass of water = 45.3g Heat capacity for water = 4.18J/g°C Final temperature =…

Q: A chemist is asked to determine the specific heat capacity of an unknown mineral. The 154-g sample…

A:

Q: 151.0-g sample of a metal at 75.0°C is added to 151.0 g H20  at 14.2°C. The temperature of the water…

A: Solution:     Specific heat is defined as the amount of heat required to raise the temperature of a…

Q: 9. A piece of aluminum is heated to a temp of 71.8°C, then placed in 150.0 mL of water at 20.7°C…

A: Given data, For Aluminum, Cp =0.903 J g-1 ℃-1 mass m=? T1=71.8 ℃  T2=25.6 ℃

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

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Q: In a calorimeter, 300 mL of 0.22 mol/L of calcium chloride is mixed with 200 mL of 0.33 mol/L of…

A: Information of question

Q: What is the enthalpy change in kJ of a chemical reaction that raises the temperature of 250.0 mL of…

A: We have to calculate the enthalpy change

Q: A beaker contained 69.68 g of water at 15.25°C. A 81.2-g sample of metal at 52.22°C was placed in…

A: Given that : The mass of water (mw)= 69.68 g Temperature of water = 15.25°C The mass of sample (mm)…

Q: A calorimeter contained 75.0 g of water at 16.95 °C. A 93.3 g sample of iron at 65.58°C was placed…

A: Specific heat capacity is equal to the heat of 1g of substance  required to raise the temperature by…

Q: Calculate the energy content (in calories) of a 1.00 g of product that is placed inside a…

A: Heat gain by water(qwater) = ms.□T  = 1250 × 4.18 ×(41.5-18)  = 122787.5 J Heat gain by Calorimeter…

Q: In a coffee-cup calorimeter, 1.59 g NH4NO3 is mixed with 74.3 g water at an initial temperature of…

A: Enthalpy change of dissolution is calculated as : ∆H = - q / n  where , n = moles  q = heat of…

Q: A hot lump of 37.0 g of copper at an initial temperature of 74.3 °C is placed in 50.0 mL H2O…

A: Given;

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: hot lump of 25.4 g of aluminum at an initial temperature of 83.0 °C is placed in 50.0 mL H2O…

A: This concept is based on principle of calorimetry in this concept heat given by system and heat lose…

Q: Thirty grams of silicon at 80.0°C is added to 70.0mL of water at 20.0°C. Calculate the final…

A: Given: The mass of silicon = 30 g The initial temperature of silicon = 80.0 °C The volume of water =…

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

Q: A piece of metal with a mass of 59.047 g was heated to 98.0°C and then put into 100.0g of water…

A: Given: Mass of the metal = 59.047 g The initial temperature of the metal = 98.0 oC The mass of water…

Q: A sample of copper was heated to 120o C and then plunged into an insulated vessel containing 200.g…

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Q: You take 246 g of a solid (melting point = 38.9 °C, heat of fusion = 425 J/g) and let it melt in 855…

A: Since we are ignoring the specific heat of the solid, we will only consider the heat required during…

Q: 33.79 g of a solid is heated to 100.°C and added to 50.0 g of water in a coffee cup calorimeter and…

A:

Q: If the molar mass of water is 18.02 g/mol and the specific heat of water is 4.184 J/g.◦C, calculate…

A: The molar mass of water = 18.02 g/mol. The specific heat of water = 4.184 J/g.◦C Molar heat capacity…

Q: When 6.54 grams of Zn is placed in 500.0 mL of 1.00 M CuSO4(aq) in a coffee cup calorimeter, it…

A: Given data,Mass of Zn=6.54gMolarity of CuSO4=1.00MVolume of CuSO4=500mL=0.5LTemperature…

Q: Calculate the energy required (in units of kJ) to heat 12.00 g water from 22.00 oC to 115.0 oC?…

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Q: When 14.2 g KBr is dissolved in 100.0 g of water in a coffee-cup calorimeter, the temperature drops…

A: