1a) A block of an alloy of mass 33.0 g and at a temperature of 289.36...

1a) A block of an alloy of mass 33.0 g and at a temperature of 289.36 K is placed in a calorimeter containing 36.0 g of ethylene glycol at 348.15 K. If the final temperature of the alloy and ethylene glycol is 306.28 K, calculate the specific heat (in J/g/K) of the metal. The specific heat of ethylene glycol is 2.39 J/g/K. Express your answer to three significant figures in scientific notation.

b) A 0.0763 g sample of solid RbBr (s) is dissolved in 449 mL of water in a coffee cup calorimeter. Once all of the RbBr (s) is dissolved in the water, the final temperature of the solution is found to be 21.76°C. If the initial temperature of the water in the calorimeter was 24.26 °C, calculate the calorimeter constant (in J/K) for the coffee cup calorimeter.

Report your answer to three significant figures.

The heat of the solvation of RbBr (s) is 21.88 kJ/mol.

c) For a given chemical process, the system absorbs 338 kJ of heat and the surroundings perform 348 kJ of work on the system. What is the value of ΔU (in kJ) for the process? Report your answer to three significant figures.

Solutions

Expert Solution

Weif u like the answer please upvoteu it.

Don't give down vote in case of any doubt regarding answer.

Please ask in comment box. It would helpful to me.

queen_honey_blossom answered 10 months ago

Next > < Previous

Related Solutions

1. A block of an alloy of mass 27.0 g and at a temperature of 277.22...

1. A block of an alloy of mass 27.0 g and at a temperature of 277.22 K is placed in a calorimeter containing 41.0 g of water at 357.74 K. If the final temperature of the alloy and water is 303.59 K, calculate the specific heat (in J/g/K) of the metal. The specific heat of water is 4.184 J/g/K. Express your answer to three significant figures in scientific notation. 2.A 0.439 g sample of solid N(CH3)4Cl (s) is dissolved in...

A bullet of mass m = 8.00 g is fired into a block of mass M...

A bullet of mass m = 8.00 g is fired into a block of mass M = 220 g that is initially at rest at the edge of a table of height h = 1.00 m (see figure below). The bullet remains in the block, and after the impact the block lands d = 2.10 m from the bottom of the table. Determine the initial speed of the bullet. ___m/s

A bullet of mass m = 8.00 g is fired into a block of mass M...

A bullet of mass m = 8.00 g is fired into a block of mass M = 210 g that is initially at rest at the edge of a table of height h = 1.00 m (see figure below). The bullet remains in the block, and after the impact the block lands d = 1.90 m from the bottom of the table. Determine the initial speed of the bullet. ________m/s

A bullet of mass m = 29 g is fired into a wooden block of mass...

A bullet of mass m = 29 g is fired into a wooden block of mass M = 4.9 kg as shown in the figure below. The block is attached to a string of length 1.5 m. The bullet is embedded in the block, causing the block to then swing as shown in the figure. If the block reaches a maximum height of h = 0.27 m, what was the initial speed of the bullet?

A bullet with a mass m b = 11.5 g is fired into a block of...

A bullet with a mass m b = 11.5 g is fired into a block of wood at velocity v b = 265 m/s. The block is attached to a spring that has a spring constant k of 205 N/m. The block and bullet continue to move, compressing the spring by 35.0 cm before the whole system momentarily comes to a stop. Assuming that the surface on which the block is resting is frictionless, determine the mass of the wooden...

A sample of steam with a mass of 0.507 g and at a temperature of 100...

A sample of steam with a mass of 0.507 g and at a temperature of 100 ∘C condenses into an insulated container holding 4.45 g of water at 4.0 ∘C.( ΔH∘vap=40.7 kJ/mol, Cwater=4.18 J/g⋅∘C) Assuming that no heat is lost to the surroundings, what is the final temperature of the mixture?

12.78 A sample of steam with a mass of 0.514 g and at a temperature of...

12.78 A sample of steam with a mass of 0.514 g and at a temperature of 100 ∘C condenses into an insulated container holding 4.50 g of water at 5.0 ∘C.( ΔH∘vap=40.7 kJ/mol, Cwater=4.18 J/g⋅∘C) Assuming that no heat is lost to the surroundings, what is the final temperature of the mixture?

A copper block of mass 6.8 kg is originally at a temperature of 18°C and 1...

A copper block of mass 6.8 kg is originally at a temperature of 18°C and 1 atm. It is then heated to a temperature of 69°C without any change in pressure. The specific heat of copper is 387 J/(kg · °C), its density is 8.94 103 kg/m3, and the coefficient of linear expansion is 17 ✕ 10 −6 /°C. (a) Determine the work done by the copper block. J (b) How much heat energy is transferred during this process? J...

An iron block of mass miron = 1 kg at a temperature of Tiron = 200°C...

An iron block of mass miron = 1 kg at a temperature of Tiron = 200°C is thrown in sub-cooled water of mass m at Twater = 25°C enclosed in an insulated container. Calculate and plot in Excel or in similar programs the entropy generated as a result of the heat transfer process for a range of water mass values between 10 kg and 10,000 kg. (Please submit your Excel sheet or your computer program with the homework.

a) A block ice of mass 1kg has a temperature of -5°C and gets placed in...

a) A block ice of mass 1kg has a temperature of -5°C and gets placed in Calorimeter A, filled with 10l of water at a temperature of 15°C. Determine the temperature Teq at equilibrium. b) An identical block of ice gets placed in calorimeter B, filled with 2l of water at a temperature of 15°C. Determine the amount of ice, Mice, left at equilibrium. Cwater = 4190J/kg*K, Cice = 2100J/kg*K, Lf= 3.34*10^5 J/kg

Subjects