An unknown material has a normal melting/freezing point of -29.9 °C, and the liquid phase has...
An unknown material has a normal melting/freezing point of -29.9 °C, and the liquid phase has a specific heat capacity of 164 J/(kg C°). One-tenth of a kilogram of the solid at -29.9 °C is put into a 0.100-kg aluminum calorimeter cup that contains 0.105 kg of glycerin. The temperature of the cup and the glycerin is initially 27.3 °C. All the unknown material melts, and the final temperature at equilibrium is 18.4 °C. The calorimeter neither loses energy to nor gains energy from the external environment. What is the latent heat of fusion of the unknown material?
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An unknown material has a normal melting/freezing point of -29.9
°C, and the liquid phase has...
tice Assignment Gradebook ORION Downloadable eTextbook ment FULL SCREEN PRINTER VERSION BACK NEXT Chapter 12, Problem...
tice Assignment Gradebook ORION Downloadable eTextbook ment FULL SCREEN PRINTER VERSION BACK NEXT Chapter 12, Problem 069 An unknown material has a normal melting/freezing point of -29.7 °C, and the liquid phase has a specific heat capacity of 159 J/(kg Cº). One-tenth of a kilogram of the solid at -29.7 °C is put into a 0.189 kg aluminum calorimeter cup that contains 0.147 kg of glycerin. The temperature of the cup and the glycerin is initially 26.8 °C. All the...
3 please Question 3 10 pts 0.2000kg of molten copper at the melting point 1083°C, is...
3 please
Question 3 10 pts 0.2000kg of molten copper at the melting point 1083°C, is placed into a 375.2g aluminum calorimeter cup filled with a quantity of ice both initially at 0.000°C. If the final temperature of the system is 91.50°C, what is the mass of the ice in kilograms in the calorimeter cup initially? The specific heat for water is 4186J/kg°C, for copper is 387J/kg°C, and for aluminum is 900 J/kg°C. The latent heat of fusion for water...
Temperature Phase change zone Freezing Melting 3. Water is the most commonly used natural phase change...
Temperature Phase change zone Freezing Melting 3. Water is the most commonly used natural phase change material (PCM). As shown in the figure, PCM experiences three stages when energy is provided. Which of the following is inccorrect about PCM? A. Stage (1) & (3) are sensible heating B. In stage (2), latent heat of PCM is used to change its phase instead of changing the temperature C. Once phase changes, PCM cannot adapt to temperature change in its environment D....
(20%) Problem 2: A piece of unknown material has a mass of m, = 0.79 kg and an initial temperature of Tu = 79°C. The s...
(20%) Problem 2: A piece of unknown material has a mass of m, = 0.79 kg and an initial temperature of Tu = 79°C. The specific heat of water is cw = 4.180 x 102 J/(kg:°C). 50% Part (a) The sample of material is dropped into my = 1.4 kg of water at T = 19°C in a calorimeter. The calorimeter reaches a final temperature of Te = 34°C. Enter an expression for the specific heat of the unknown material,...
A. The normal melting point of naphthalene is 80.0 °C. At 85.8 Celsius, the liquid has...
A. The normal melting point of naphthalene is 80.0 °C. At 85.8 Celsius, the liquid has a vapor pressure of 10.0 Torr which increases to 40.0 Torr at 119.3°c. Use this information to calculate the heat of vaporization, the normal boiling point, and the entropy of vaporiza of naphthalene. How similar is your calculated entropy change to the prediction of Trouton's rule? B. Assume that the triple point temperature of naphthalene is also 80.0 Celsius and that the sublimation pressure...
2. 50 g of an unknown material is heated to 90 °C and added to 200...
2. 50 g of an unknown material is heated to 90 °C and added to 200 g of water at 25 °C. The system reaches thermal equilibrium at a temperature of 25.9 °C. What is the specific heat of the unknown material? A. 1.11 B. 4.65 C. 16.7 D. 0.235 3. How much heat must be removed from the system to freeze a 4.5 kg (10 pounds) bag of ice purchased at Buc-ee's? The latent heat of fusion for water...
Use the following table of thermal physics specs. Latent specific melting/freezing heat of substance heat point...
Use the following table of thermal physics specs. Latent specific melting/freezing heat of substance heat point (K) fusion (cal/g K) (cal/g) solid H2O 0.50 273 80 liquid H2O 1.00 273 80 solid gold 0.0301 1336 15 liquid gold 0.0355 1336 15 solid lead 0.0305 601 5.5 liquid lead 0.033 601 5.5 HEAT-MELT-HEAT CALCULATION (3 points) How much energy is required to convert 1.00 gram of solid gold at intial temperature T; = 1335 K to liquid gold at final temperature...
Ethyl alcohol has a boiling point of 78.0 ˚C, a freezing point of -114 ˚C, a...
Ethyl alcohol has a boiling point of 78.0 ˚C, a freezing point of -114 ˚C, a heat of vaporization of 879 kJ/kg, a heat of fusion of 109 kJ/kg, and a specific heat of 2.43 kJ/kg·K. How much energy must be removed from 0.689 kg of ethyl alcohol that is initially a gas at 78.0 ˚C so that it becomes a solid at -114 ˚C?
Ethyl alcohol has a boiling point of 78.0 ˚C, a freezing point of -114 ˚C, a...
Ethyl alcohol has a boiling point of 78.0 ˚C, a freezing point of -114 ˚C, a heat of vaporization of 879 kJ/kg, a heat of fusion of 109 kJ/kg, and a specific heat of 2.43 kJ/kg·K. How much energy must be removed from 0.683 kg of ethyl alcohol that is initially a gas at 78.0 ˚C so that it becomes a solid at -114 ˚C?
A 355-g sample of an unknown (nongaseous) material experiences a 15.0°C increase in temperature after absorbing...
A 355-g sample of an unknown (nongaseous) material experiences a 15.0°C increase in temperature after absorbing 2.08 x 104 ) of energy. (a) What is the specific heat of this material? J/(kg . °C) (b) Which substance listed in the specific heat and molar specific heat table best matches the specific heat of this unknown material? O mercury O silver Obrass O granite Oglass O aluminum O wood O seawater
tice Assignment Gradebook ORION Downloadable eTextbook ment FULL SCREEN PRINTER VERSION BACK NEXT Chapter 12, Problem 069 An unknown material has a normal melting/freezing point of -29.7 °C, and the liquid phase has a specific heat capacity of 159 J/(kg Cº). One-tenth of a kilogram of the solid at -29.7 °C is put into a 0.189 kg aluminum calorimeter cup that contains 0.147 kg of glycerin. The temperature of the cup and the glycerin is initially 26.8 °C. All the...
3 please
Question 3 10 pts 0.2000kg of molten copper at the melting point 1083°C, is placed into a 375.2g aluminum calorimeter cup filled with a quantity of ice both initially at 0.000°C. If the final temperature of the system is 91.50°C, what is the mass of the ice in kilograms in the calorimeter cup initially? The specific heat for water is 4186J/kg°C, for copper is 387J/kg°C, and for aluminum is 900 J/kg°C. The latent heat of fusion for water...
Temperature Phase change zone Freezing Melting 3. Water is the most commonly used natural phase change material (PCM). As shown in the figure, PCM experiences three stages when energy is provided. Which of the following is inccorrect about PCM? A. Stage (1) & (3) are sensible heating B. In stage (2), latent heat of PCM is used to change its phase instead of changing the temperature C. Once phase changes, PCM cannot adapt to temperature change in its environment D....
(20%) Problem 2: A piece of unknown material has a mass of m, = 0.79 kg and an initial temperature of Tu = 79°C. The specific heat of water is cw = 4.180 x 102 J/(kg:°C). 50% Part (a) The sample of material is dropped into my = 1.4 kg of water at T = 19°C in a calorimeter. The calorimeter reaches a final temperature of Te = 34°C. Enter an expression for the specific heat of the unknown material,...
2. 50 g of an unknown material is heated to 90 °C and added to 200 g of water at 25 °C. The system reaches thermal equilibrium at a temperature of 25.9 °C. What is the specific heat of the unknown material? A. 1.11 B. 4.65 C. 16.7 D. 0.235 3. How much heat must be removed from the system to freeze a 4.5 kg (10 pounds) bag of ice purchased at Buc-ee's? The latent heat of fusion for water...
Use the following table of thermal physics specs. Latent specific melting/freezing heat of substance heat point (K) fusion (cal/g K) (cal/g) solid H2O 0.50 273 80 liquid H2O 1.00 273 80 solid gold 0.0301 1336 15 liquid gold 0.0355 1336 15 solid lead 0.0305 601 5.5 liquid lead 0.033 601 5.5 HEAT-MELT-HEAT CALCULATION (3 points) How much energy is required to convert 1.00 gram of solid gold at intial temperature T; = 1335 K to liquid gold at final temperature...
A 355-g sample of an unknown (nongaseous) material experiences a 15.0°C increase in temperature after absorbing 2.08 x 104 ) of energy. (a) What is the specific heat of this material? J/(kg . °C) (b) Which substance listed in the specific heat and molar specific heat table best matches the specific heat of this unknown material? O mercury O silver Obrass O granite Oglass O aluminum O wood O seawater
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