С. 25% D. 0.0075% E. 10% 9. The specific heat of water is 4186 J/kg- C, which is twice higher than that of methanol 2093 J/kg °C. Initially water is at 10°C and methanol is at 40°C. Two liquids are mixed in equal mass proportion and the mixture is thermally isolated. The final temperature of the mixture is: A. 30°C В. 20°С С. 25°С D. 15°C E. 41.9°C

С. 25% D. 0.0075% E. 10% 9. The specific heat of water is 4186 J/kg- C, which is twice higher than that of methanol 2093 J/kg °C. Initially water is at 10°C and methanol is at 40°C. Two liquids are mixed in equal mass proportion and the mixture is thermally isolated. The final temperature of the mixture is: A. 30°C В. 20°С С. 25°С D. 15°C E. 41.9°C

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter21: Heat And The First Law Of Thermodynamics

Section: Chapter Questions

Problem 21PQ

See similar textbooks

Similar questions

One way to cool a gas is to let it expand. When a certain gas under a pressure of 5.00 106 Ha at 25.0C is allowed to expand to 3.00 times its original volume, its final pressure is 1.07 106 Pa. (a) What is the initial temperature of the gas in Kelvin? (b) What is the final temperature of the system? (See Section 10.4.)
A hollow aluminum cylinder 20.0 cm deep has an internal capacity of 2.000 L at 20.0C. It is completely filled with turpentine at 20.0C. The turpentine and the aluminum cylinder are then slowly warmed together to 80.0C. (a) How much turpentine overflows? (b) What is the volume of the turpentine remaining in the cylinder at 80.0C? (c) If the combination with this amount of turpentine is then cooled back to 20.0C, how far below the cylinders rim does the turpentines surface recede?
A hollow aluminum cylinder 20.0 cm deep has an internal capacity of 2.000 L at 20.0C. It is completely filled with turpentine at 20.0C. The turpentine and the aluminum cylinder are then slowly warmed together to 80.0C. (a) How much turpentine overflows? (b) What is the volume of the turpentine remaining in the cylinder at 80.0C? (c) If the combination with this amount of turpentine is then cooled back to 20.0C, how far below the cylinders rim does the turpentines surface recede?
At 25.0 m below the surface of the sea, where the temperature is 5.00C, a diver exhales an air bubble having a volume of 1.00 cm3. If the surface temperature of the sea is 20.0C, what is the volume of the bubble just before it breaks the surface?
Consider the latent heat of fusion and the latent heat of vaporization for H2O, 3.33 105 J/kg and 2.256 106 J/kg, respectively. How much heat is needed to a. melt 2.00 kg of ice and b. vaporize 2.00 kg of water? Assume the temperatures of the ice and steam are at the melting point and vaporization point, respectively. (a). UsingEq21.9, Q = mLF = (2.00 kg) (3.33l05 J/kg) = 6.66105 J (b).UsingEq21.10. Q = mLV = (2.00kg) (2.256106 J/kg) = 14.51106 J
A 1.0-m-long steel beam, initially at a temperature of 250 C, increases in temperature to 1000 C by inserting it into an insulating jacket for several minutes while the inside of the jacket is subsequently flooded with steam. By how much does the length of the steel beam expand? (The thermal coefficient of linear expansion for steel is 12 x 10-6 (C0)-1) a. 0.90 mm b. 1.0 mm c. 0.70 mm d. 0.80 mm e. 0.60 mm
Carbon steel balls (r = 7833 kg/m3, k = 54 W/m·K, cp = 0.465 kJ/kg·°C, and a = 1.474 * 1026 m2/s) 8 mm in diameter are annealed by heating them first to 900°C in a furnace and then allowing them to cool slowly to 100°C in ambient air at 35°C. If the average heat transfer coefficient is 75 W/m2·K, determine how long the annealing process will take. If 2500 balls are to be annealed per hour, determine the total rate of heat transfer from the balls to the ambient air.
Water with a mass of mW = 0.400 kg and temperature of TW = 18.5°C is poured into an insulated bucket containing mI = 0.11 kg of ice at a temperature of TI = -18°C. Assume the specific heats of ice and water are constant at cI = 2.10×103 J/(kg⋅°C) and cW = 4.19×103 J/(kg⋅°C), respectively. The latent heat of fusion for water is Lf = 334×103 J/kg. What is the final temperature of the mixture, in degrees Celsius?
The inner and outer surface temperature of a 1 sq. ft. wall of a kiln are 1800 °F and 200 °F respectively, which is made up of (inner to outer) 12-in fire bricks (k=0.80 BTU/hr-ft-°F), 7-in insulating bricks (0.10 BTU/hr-ft-°F) and 9-in red bricks (k=0.70 BTU/hr-ft-°F). Neglecting the residences of the mortar, compute the temperature for the fire bricks and insulating bricks.
A student measures the following data in a calorimetry experiment designed to determine the specific heat of aluminum:Initial temperature of water and calorimeter: 70.08CMass of water: 0.400 kgMass of calorimeter: 0.040 kgSpecific heat of calorimeter: 0.63 kJ/kg ? °CInitial temperature of aluminum: 27.0°CMass of aluminum: 0.200 kgFinal temperature of mixture: 66.3°C(a) Use these data to determine the specific heat of aluminum.(b) Explain whether your result is within 15% of the value listed as shown.
A 405-g sample of lead with specific heat cPb = 128 J/(kg · °C) at 87.0°C and a 220-g sample of silver with specific heat cAg = 230.0 J/(kg · °C) at 38.0°C are added to 0.500 kg of water at 22.0°C where specific heat of water cW = 4190 J/(kg · °C) in an insulated container. Assuming the system is thermally isolated, what is its final equilibrium temperature?
For a certain gas, R=0.267 kJ/kg∙K and k=1.384. (a) What is the value of specific heat at constant pressure in kJ/kg∙K?