A rigid tank whose volume is 3 m3, initially containing air at 1 bar, 295 K, is connected by a valve to a large vessel holding air at 6 bar, 295 K. The valve is opened only as long as required to fill the tank with air to a pressure of 6 bar and a temperature of 320 K.Assuming the ideal gas model for the air, determine the heat transfer between the tank contents and the surroundings, in kJ.Qey =k)the tolerance is +/-5%

Answered: Image /qna-images/answer/9d31bec2-4609-49e0-969a-9c85f3709a41.jpg

A rigid tank whose volume is 3 m3, initially containing air at 1 bar, 295 K, is connected by a valve to a large vessel holding air at 6 bar, 295 K. The valve is opened only long as required to Il the tank with air to a pressure of 6 bar and a temperature of 320 K. Assuming the ideal gas model for the air, determine the heat transfer between the tank contents and the surroundings, in kJ. the tolerance is +/-5%

A rigid tank whose volume is 3 m3, initially containing air at 1 bar, 295 K, is connected by a valve to a large vessel holding air at 6 bar, 295 K. The valve is opened only long as required to Il the tank with air to a pressure of 6 bar and a temperature of 320 K. Assuming the ideal gas model for the air, determine the heat transfer between the tank contents and the surroundings, in kJ. the tolerance is +/-5%

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter1: Basic Modes Of Heat Transfer

Section: Chapter Questions

Problem 1.22P: 1.22 In order to prevent frostbite to skiers on chair lifts, the weather report at most ski areas...

See similar textbooks

Similar questions

1.22 In order to prevent frostbite to skiers on chair lifts, the weather report at most ski areas gives both an air temperature and the wind-chill temperature. The air temperature is measured with a thermometer that is not affected by the wind. However, the rate of heat loss from the skier increases with wind velocity, and the wind-chill temperature is the temperature that would result in the same rate of heat loss in still air as occurs at the measured air temperature with the existing wind. Suppose that the inner temperature of a 3-mm-thick layer of skin with a thermal conductivity of 0.35 W/m K is and the air temperature is . Under calm ambient conditions the heat transfer coefficient at the outer skin surface is about (see Table 1.4), but in a 40-mph wind it increases to . (a) If frostbite occurs when the skin temperature drops to about , do you advise the skier to wear a face mask? (b) What is the skin temperature drop due to the wind?
b) A thermometer having a time constant of 1 min is initially at 50 °C. It is immersed in a bath maintained at 100 °C at time = 0. Express temperature in °C at time = min 1.2
Air treated as an ideal gas and having a specific heat at constant volume Cv=1200 J/kg.K undergoes a process. During this process, heat is observed to exit the system with an amount of 10 k) while work is provided to the system with an amount of 24 kJ. If the initial temperature of air was 20 C, what is the final temperature of air if the mass of air undergoing the process is 0.2 Kg. Select one: O a. 81.5 C O b. 74.5 C O c. 69.5 C d. 78.3 C
Q1. The following data is obtained during geothermal drilling operation. Rock density = 1550 kg/m ³, heat capacity of the rock = 0.00163 J/kg K, temperature difference = 80 K. How much will be the thermal heat content of the rock at the geothermal site? Discuss about geothermal gradients their importance in energy exploration. Do you think utilization of geothermal energy worldwide is increasing yearly? Justify your answer. Do you think the geothermal energy available in this site can be used for a metal melting industry?
Air treated as an ideal gas and having a specific heat at constant volume Cv=1200 J/kg.K undergoes a process. During this process, heat is observed to exit the system with an amount of 10 kJ while work is provided to the system with an amount of 28 kJ. If the initial temperature of air was 20 C, what is the final temperature of air if the mass of air undergoing the process is 0.7 Kg. Select one: O a. 35.5 C O b. 52.4 C c. 41.4 C O d. 29.5 C
Please show detailed solution. Thanks! In a piston-and-cylinder apparatus the initial volume of air is 90 L at a pressure of 130 Kpa abs and temperature of 26°C. If the pressure is doubled while the volume is decreased to 56 L, compute the following using R=0.287 KJ/kg-K. a)Mass of air, in kg b)Final temperature of the air in °C.
NOTE: Complete manual computation. Show the integration method and derivation of units. The specific heat of a certain ideal gas is given as a function of 345.1 4.13 x 104 KJ temperature: Cp = [1.54 - when temperature increases %3D T T2 kg K from 325°K to 1,100°K. Find the change of enthalpy.
Determine the value of degree of superheat if steam has 100 Bar pressure and the corresponding saturation temperature is 311 ° C. Given: Temperature of superheated steam is 350 ° C. Select one: A. 311 ° C B. 39 ° C C. 350 ° C D. 49 ° C
Q1. (Reading: Çengel and Boles, Thermodynamics: An Engineering Approach, 8th Ed., Pages 307-311) The amount of energy waste by a refrigerator increases by a number of malpractices. For example; opening the refrigerator door frequently will increase energy waste as the warmer air outside replaces the cool air inside. It is also not recommended to place the hot foods into the refrigerator before cooling them to the room temperature. Imagine a typical household refrigerator with an internal temperature of 4 °C. The refrigerator has a coefficient of performance of 1.4. The internal dimensions of this refrigerator are 186 cm (height) x 84 cm (width) x 75 cm (depth). The half of the refrigerator volume is used for storing food items. The air filling the other half of the refrigator volume contains 0.004 kg moisture/kg air on average. While the moisture content of the air in the kitchen is 0.01 kg/kg air, the temperature and pressure in the kitchen are 23°C and 97 kPa, respectively. Assuming…
A gas contained within a cylinder fitted with a piston is initially at a pressure of 50 bar. The gas expands pushing the piston outwards through a volume ratio of 5. If the expansion process is polytropic with an index of expansion of 2, which of the following represents what final pressure will be? Select one: а. 1 bar O b. 50 bar Oc. 10 bar O d. 2 bar O e. 5 bar
Direction: Show your complete solution and box you final answer. Do not round off in between the solutions but round off your final answer to the nearest ten thousandths place(4 decimal places). 1. A fluid enters a machine at 170 m/s, 800 kPa, and with a specific volume of 0.3 m^3/kg. The radiation heat loss is 25 kJ/kg. The internal energy decreases by 495 kJ/kg. If the fluid leaves at 330 m/s, 138 kPa, and 0.95 m^3/kg, determine the work done by the fulid in kJ/kg.
1) A piston-cylinder system containing 1100 grams of an ideal gas ‘X’ is cooled from 900 K to 100 K at constant pressure. The specific heat capacity of the gas is Cp = 38.3 J.mol-1.K-1. Assume Cp stays constant in the given temperature range. The molar mass of the gas = 28 g.mol-1. a) Write the simplified first law of thermodynamics for this system with justification. b) Calculate the total heat transferred (in kJ) during the process of cooling c) If the entire heat from the cooling of ‘X’ (as calculated in (b)) could be used as work to change the volume of another gas ‘Y’ from 500 m3 to 1000 m3 in a constant pressure process, calculate the value of pressure. d) Instead of cooling at constant pressure, if ‘X’ was expanded reversibly and at a constant temperature (300K), calculate the work done by the system in kJ if the change in volume was 10-fold.