7. A thermally isolated system is made up of a hot piece of aluminum and a...
7. A thermally isolated system is made up of a hot piece of aluminum and a cold piece of copper, with the aluminum and the copper in thermal contact. If the specific heat capacity of aluminum is double that of copper, which object experiences the greater temperature change during the time the system takes to reach thermal equilibrium? a) the copper b) the aluminum c) both metals experience the same size temperature change d) it cannot be determined from the information provided
Homework Answers
d) it cannot be determined from the information provided
Because you need to know the masses of each to calculate the change in temperature.
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7. A thermally isolated system is made up of a hot piece of
aluminum and a...
Answer #22 Multiple Choice- You do not need to show your work - No partial credit...
Answer #22
Multiple Choice- You do not need to show your work - No partial credit Phys 270 Final-B 22. A particle of kinetic energy 50cV in free space travels into a region with a potential well of depth 40eV. What happens to its speed? (a) It decreases in the region of the well. (b) It increases in the region of the well. (c) It remains the same. (d) It cannot be determined from the information given. double-convex lens is...
Two substances A and B, initially at different temperatures, are thermally isolated from their surroundings and...
Two substances A and B, initially at different temperatures, are thermally isolated from their surroundings and allowed to come into thermal contact. The mass of substance A is twice the mass of substance B, but the specific heat capacity of substance B is four times the specific heat capacity of substance A. Which substance will undergo a larger change in temperature?
A piece of copper is held in a flame until it reaches thermal equilibrium. The time...
A piece of copper is held in a flame until it reaches thermal equilibrium. The time t takes to reach thermal equilibrium will depend on the thermal capacity of the piece of copper. Then, the piece of copper is transferred quickly to a plastic cup containing water. The thermal capacity of the cup is negligible. The following data are available. 6. Mass of copper Mass of water Rise in temperature of water Final temperature of copper Specific heat capacity of...
An isolated system consists of two very large thermal reservoirs, one hot and one cold, with...
An isolated system consists of two very large thermal reservoirs, one hot and one cold, with constant temperatures of 373 K and 273 K, respectively. If 1000 J of heat were to flow from the cold reservoir to the hot reservoir spontaneously, (a) what would be the change in entropy of the hot reservoir? (b) of the cold reservoir? (c) What would be the total change in entropy of the isolated system? (d) could the process take place naturally?
4. A 0.500 kg piece of copper at an initial temperature of 20.0°C is placed in...
4. A 0.500 kg piece of copper at an initial temperature of 20.0°C is placed in a water bath and the temperature of the metal is raised to 100.0°C. Note: The specific heat capacity of copper is 385J/kg K and the latent heat of fusion is 2.07x1057/kg. a. How much heat was required to raise the temperature of the copper? b. How much more heat would be required to raise the copper to its melting point? C. How much heat...
1) Use the Energy-Interaction Model to explain whether the following statement is true or false
1) Use the Energy-Interaction Model to explain whether the following statement is true or false: "A quantity of ice at 0℃ must contain less total energy than the same quantity of water at 0℃.2) According to the definition of heat in the online reading, can an energy system contain a certain amount of heat? Explain.3) Imagine that you place a piece of copper with an initial temperature of 20℃ in contact with some liquid water with an initial temperature of...
L) Hone of the above 13) Consider the following specific heats of metals. 13) Metal Aluminum...
L) Hone of the above 13) Consider the following specific heats of metals. 13) Metal Aluminum Copper Gold Iron Silver Specific Heat I/g.°C) 0.903 0.385 0.128 0.449 0.235 If the same amount of heat is added to 50.0 g samples of each of the metals, which are all at the same temperature, which metal will reach the highest temperature? A) iron B) copper C) gold D) silver E) aluminum 14) In calculating the relationship between the amount of heat added...
A hot 104.2 g lump of an unknown substance initially at 171.6 °C is placed in...
A hot 104.2 g lump of an unknown substance initially at 171.6 °C is placed in 35.0 mL of water initially at 25.0 °C and the system is allowed to reach thermal equilibrium. The final temperature of the system is 46.6 °C. Substance aluminum graphite rhodium titanium Specific heat (J/(g•°C)) 0.897 0.709 0.243 0.523 0.132 0.388 Using this information and the specific heat values for several metals in the table, identify the unknown substance. Assume no heat is lost to...
A hot 105.8 g lump of an unknown substance initially at 179.7 °C is placed in 35.0 mL of water initially at 25.0 °C and...
A hot 105.8 g lump of an unknown substance initially at 179.7 °C is placed in 35.0 mL of water initially at 25.0 °C and the system is allowed to reach thermal equilibrium. The final temperature of the system is 77.4 °C. Substance Specific heat (J/(g·°C)) aluminum 0.897 graphite 0.709 rhodium 0.243 titanium 0.523 tungsten 0.132 zinc 0.388 water 4.184 Using this information and the specific heat values for several metals in the table, identify the unknown substance. Assume no...
Two vessels A and B each contain N molecules of the same ideal monatomic gas at the same pressure P. Initially, the two...
Two vessels A and B each contain N molecules of the same ideal monatomic gas at the same pressure P. Initially, the two vessels are thermally isolated from each other, and have initial temperatures TA and Ta respectively. The two vessels are brought into thermal contact, and reach equilibrium at the same pressure P and the new final temperature 7, 4-2 (a) Calculate an expression for the final temperature in terms of the initial temperatures. [2 marks] (b) Find the...
Answer #22
Multiple Choice- You do not need to show your work - No partial credit Phys 270 Final-B 22. A particle of kinetic energy 50cV in free space travels into a region with a potential well of depth 40eV. What happens to its speed? (a) It decreases in the region of the well. (b) It increases in the region of the well. (c) It remains the same. (d) It cannot be determined from the information given. double-convex lens is...
A piece of copper is held in a flame until it reaches thermal equilibrium. The time t takes to reach thermal equilibrium will depend on the thermal capacity of the piece of copper. Then, the piece of copper is transferred quickly to a plastic cup containing water. The thermal capacity of the cup is negligible. The following data are available. 6. Mass of copper Mass of water Rise in temperature of water Final temperature of copper Specific heat capacity of...
4. A 0.500 kg piece of copper at an initial temperature of 20.0°C is placed in a water bath and the temperature of the metal is raised to 100.0°C. Note: The specific heat capacity of copper is 385J/kg K and the latent heat of fusion is 2.07x1057/kg. a. How much heat was required to raise the temperature of the copper? b. How much more heat would be required to raise the copper to its melting point? C. How much heat...
L) Hone of the above 13) Consider the following specific heats of metals. 13) Metal Aluminum Copper Gold Iron Silver Specific Heat I/g.°C) 0.903 0.385 0.128 0.449 0.235 If the same amount of heat is added to 50.0 g samples of each of the metals, which are all at the same temperature, which metal will reach the highest temperature? A) iron B) copper C) gold D) silver E) aluminum 14) In calculating the relationship between the amount of heat added...
A hot 104.2 g lump of an unknown substance initially at 171.6 °C is placed in 35.0 mL of water initially at 25.0 °C and the system is allowed to reach thermal equilibrium. The final temperature of the system is 46.6 °C. Substance aluminum graphite rhodium titanium Specific heat (J/(g•°C)) 0.897 0.709 0.243 0.523 0.132 0.388 Using this information and the specific heat values for several metals in the table, identify the unknown substance. Assume no heat is lost to...
Two vessels A and B each contain N molecules of the same ideal monatomic gas at the same pressure P. Initially, the two vessels are thermally isolated from each other, and have initial temperatures TA and Ta respectively. The two vessels are brought into thermal contact, and reach equilibrium at the same pressure P and the new final temperature 7, 4-2 (a) Calculate an expression for the final temperature in terms of the initial temperatures. [2 marks] (b) Find the...
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