A 44 g piece of aluminum at 20°C is cooled to -196°C by placing it in...
A 44 g piece of aluminum at 20°C is cooled to -196°C by placing
it in a large container of liquid nitrogen at that temperature. How
much nitrogen is vaporized?
(Assume that the specific heat of aluminum is constant and is equal
to 0.90 kJ/kg·K and that the vaporized nitrogen's temperature does
not change.)
Answer is in grams
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A 44 g piece of aluminum at 20°C is cooled to -196°C by placing
it in...
A 41 g piece of aluminum at 19°C is cooled to -196°C by placing it in...
A 41 g piece of aluminum at 19°C is cooled to -196°C by placing it in a large container of liquid nitrogen at that temperature. How much nitrogen is vaporized? (Assume that the specific heat of aluminum is constant and is equal to 0.90 kJ/kg·K and that the vaporized nitrogen's temperature does not change.)
1. Liquid nitrogen at −196° C (nitrogen’s boiling point) is placed in a container with 3...
1. Liquid nitrogen at −196° C (nitrogen’s boiling point) is placed in a container with 3 kg of water at 25° C. (a) Suppose you add just enough liquid nitrogen such that all the water just freezes (i.e., the final state of the water is ice at 0° C). Draw a complete energy interaction diagram for this scenario, including a conservation of energy equation. (b) How much liquid nitrogen should you put in the container such that all the water...
4) If 46.2 g piece of aluminum is cooled from 84.5 °C to 29.5C, how much...
4) If 46.2 g piece of aluminum is cooled from 84.5 °C to 29.5C, how much energy was lost by aluminum? (specific heat of aluminum is 0.901 J/(g.°C)) 5) If 78.6 g piece of iron is dropped into 100.0 g of water initially at 24.6 °C. The final temperature of both water and iron was measure at 28.5 °C. Calculate the initial temperature of iron? (Specific heat of water and iron from #1)
A 200 g aluminum calorimeter can contain 500 g of water at 20 C. A 100...
A 200 g aluminum calorimeter can contain 500 g of water at 20 C. A 100 g piece of ice cooled to -20 C is placed in the calorimeter. Find the final temperature of the system, assuming no heat losses. (Assume that the specific heat of ice is 2.0 kJ/kg K) A second 200 g piece of ice at -20 C is added. How much ice remains in the system after it reaches equilibrium? Would your answer to part b...
// Chemical potential/phases A substance has three phases: gas, liquid, and solid. The chemical potentials of various phases are illustrated below. T (K) 1) For a given temperature, which of the sta...
//
Chemical potential/phases A substance has three phases: gas, liquid, and solid. The chemical potentials of various phases are illustrated below. T (K) 1) For a given temperature, which of the states represents an equilibrium condition? Submit 2) If the substance starts out in state Q and is held at constant temperature, what happens if it is allowed to reach equilibrium? The substance will freeze. The substance will evaporate The substance will melt and evaporate. The substance will sublime. Nothing...
How much heat must be removed when 102 g of steam at 144°C is cooled and...
How much heat must be removed when 102 g of steam at 144°C is cooled and frozen into 102 g of ice at 0°C. (Take the specific heat of steam to be 2.01 kJ/kg·K.) I got 67 but its wrong.
When a 310-g piece of iron at 180 ∘C is placed in a 95-g aluminum calorimeter...
When a 310-g piece of iron at 180 ∘C is placed in a 95-g aluminum calorimeter cup containing 250 g of liquid at 10∘C, the final temperature is observed to be 37 ∘C. The value of specific heat for iron is 450 J/kg⋅C∘, and for aluminum is 900 J/kg⋅C∘. Part A Determine the specific heat of the liquid. Express your answer using two significant figures. c c = nothing Jkg⋅C∘ Request Answer
The boiling temperature of nitrogen at atmospheric pressure at sea level (1 atm pressure) is -196°C. Therefore, nitroge...
The boiling temperature of nitrogen at atmospheric pressure at sea level (1 atm pressure) is -196°C. Therefore, nitrogen is commonly used in low-temperature scientific studies since the temperature of liquid nitrogen in a tank open to the atmosphere will remain constant at -196°C until it is depleted. Any heat transfer to the tank will result in the evaporation of some liquid nitrogen, which has a heat of vaporization of 198 kJ/kg and a density of 810 kg/m3 at 1 atm....
A hot piece of aluminum weighing 50.0 grams at 350°C is dropped into 500. grams of...
A hot piece of aluminum weighing 50.0 grams at 350°C is dropped into 500. grams of water at 22.0°C. What is the final temperature of the water? The specific heat of aluminum is 0.902 J/g°C and that of water is 4.184 J/g°C.
1). A sheet of aluminum foil with a mass of 25 g is taken from a...
1). A sheet of aluminum foil with a mass of 25 g is taken from a room at 25° C and placed in a oven at 200.° C. How much heat does the aluminum absorb? The specific heat of aluminum is 0.90 J/g °C. 2). The value of AH° for the reaction below is -790 kJ. The enthalpy change accompanying the reaction of 0.95 g of S is 28 (s) + 302 (9) — 2503 (9)
4) If 46.2 g piece of aluminum is cooled from 84.5 °C to 29.5C, how much energy was lost by aluminum? (specific heat of aluminum is 0.901 J/(g.°C)) 5) If 78.6 g piece of iron is dropped into 100.0 g of water initially at 24.6 °C. The final temperature of both water and iron was measure at 28.5 °C. Calculate the initial temperature of iron? (Specific heat of water and iron from #1)
//
Chemical potential/phases A substance has three phases: gas, liquid, and solid. The chemical potentials of various phases are illustrated below. T (K) 1) For a given temperature, which of the states represents an equilibrium condition? Submit 2) If the substance starts out in state Q and is held at constant temperature, what happens if it is allowed to reach equilibrium? The substance will freeze. The substance will evaporate The substance will melt and evaporate. The substance will sublime. Nothing...
The boiling temperature of nitrogen at atmospheric pressure at sea level (1 atm pressure) is -196°C. Therefore, nitrogen is commonly used in low-temperature scientific studies since the temperature of liquid nitrogen in a tank open to the atmosphere will remain constant at -196°C until it is depleted. Any heat transfer to the tank will result in the evaporation of some liquid nitrogen, which has a heat of vaporization of 198 kJ/kg and a density of 810 kg/m3 at 1 atm....
1). A sheet of aluminum foil with a mass of 25 g is taken from a room at 25° C and placed in a oven at 200.° C. How much heat does the aluminum absorb? The specific heat of aluminum is 0.90 J/g °C. 2). The value of AH° for the reaction below is -790 kJ. The enthalpy change accompanying the reaction of 0.95 g of S is 28 (s) + 302 (9) — 2503 (9)
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