Determine the mixture pressure after equilibrium has been established. The universal gas constant is R₁ = 8.314 kPa-m³/kmol-K. Use the table containing the molar mass, gas constant, and critical-point properties.
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- A group of twenty executives attend a board meeting in a room that measures 20 feet by 20 feet and has a 10-foot ceiling. Suppose each person occupies 2.5 feet and gives out about 375 BTUs of heat per hour. Calculate the temperature rise that occurs within 20 minutes of the start of the conference if the room is completely sealed and insulated, Take c for air as 0.1825 BTU / Lbmd Ibm ° F.bliuzodt to mopolb 9. If machine parts are degreased by means of kerosene as shown in the diagram, how much kerosene make-up is needed per day? How much kerosene has to enter the degreasing vat per day? There are about 3 lb of grease per 100 lb of machine parts, and 60 tons of machine parts are processed each day. Five thousand pounds of kerosene (the 10% solution) are carried away by the machine parts each day but drip off and are caught and put back in the degreasing vat. Two hundred pounds of the 10% solution are lost each day from the vat by evaporation, spillage, or by being carried away.Solve question 2 based on the answer of question 1. You have a natural gas furnace in your home that used 78,500 cubic feet of natural gas for heating last winter. Your neighbor has a furnace that burns heating oil and used 516 gallons of heating oil last winter. You can convert the natural gas and heating oil consumption data into Btu to determine which home used more energy for heating. Natural gas BTU: 1,028 Btu per cubic foot Oil BTU: 138,590 Btu per gallon Natural Gas BTU= 80,698,000 Oil BTU = 71,512,440 The home that used a natural gas furnace used more energy for heating. 2.- You need a new furnace for your home, and you are comparing systems that use natural gas and heating oil. One factor to consider is the cost of the fuel. You can compare the price of the fuels on an equal basis by dividing the price per unit of the fuels by the Btu content per unit of the fuels to get a price per million Btu. Assume Natural gas price = $10.50 per thousand cubic…
- Task 5 A sample of gas is compressed by an average pressure of 2 atm which decrease its volume from 400 cm 3 to 200 cm . During the process, 10 J of heat is rejected to the surroundings. Explain and demonstrate the application of the first law of thermodynamics to this system and calculate the change in energy of the system.Answer question 2 based on the results of question 1. You have a natural gas furnace in your home that used 78,500 cubic feet of natural gas for heating last winter. Your neighbor has a furnace that burns heating oil, and used 516 gallons of heating oil last winter. You can convert the natural gas and heating oil consumption data into Btu to determine which home used more energy for heating. Natural gas BTU: 1,028 Btu per cubic foot Oil BTU: 138,590 Btu per gallon Natural Gas BTU= 80698000 Btu Oil BTU = 71512440 Btu The home that used a natural gas furnace used more energy for heating. 2. You need a new furnace for your home, and you are comparing systems that use natural gas and heating oil. One factor to consider is the cost of fuel. You can compare the price of the fuels on an equal basis by dividing the price per unit of the fuels by the Btu content per unit of the fuels to get a price per million Btu. Assume Natural gas price = $10.50 per thousand cubic…Q\ Which of the following represents the first law of thermodynamics? Possible Answers: a. While melting, an ice cube remains at the same temperature b. The specific heat of an object explains how easily it changes temperatures c. After falling down the hill, a ball's kinetic energy plus heat energy equals the initial potential energy d. Two systems in equilibrium with a third system are in equilibrium with each other e. If a refrigerator is unplugged, eventually everything inside of it will return to room temperature.
- XYZ Company Ltd has consulted your firm Zig-Zag Energy over an intention to generate electricity in Ghana. Being the senior project engineer for Zig-Zag Energy, management has asked you to prepare a detailed technical report in respect to the project. a) Discuss the major factors to take into consideration when consulting on such projects. A tank containing air is stirred by a paddle wheel. The work input to the paddle wheels is 2000KJ and the heat transferred to the surrounding from the tank is 6000KJ. b) Determine the change in the internal energy of the system There has been a sharp differences between the board of Blue-Blue Energy over which of the energy sources (hydroelectric power plant-HEP and Coal fired plant) is best for power generation. As an energy expert, you were confronted by the debating faction for your opinion. You…What does it mean for an engineering device that has steady-flow? (choose 3 answers) 1- it has been operating for a long time. 2- the properties do not change with time. 3- the property values can be different at different location in the device. 4- the total energy content in the control volume remains unchanged. 5- the rate of energy coming into the system equals to the rate of energy exits the system.4. For each of the situations in trie lapie welow, state the process by which heat is transferred. Getting burnt by touching a hot stove Hot air rising, cooling and falling Heat from a campfire when you are seated beside it Ice cooling down your hand Heat from the Sun warming your face Boiling water by thrusting a red-hot piece of iron into it A slice of bread placed undera red-hot electric grill to make toast Heating a tin can of water using a Bunsen burner
- When a stationary mass of gas was compressed without friction at constant pressure its initial state of 0.8 m3 and 0.105 MPa was found to change to final state of 0.40 m3 and 0.105 MPa. There was a transfer of 85 kJ of heat from the gas during the process.How much did the internal energy of the gas change ? * 1 Add FileTask 1: Your first customer asked for a 1-m x 1-m x 1-m rubber room that is heated by a steam-radiator system. Your role in your company is to analyze, describe the operation of the system and their properties, explain and demonstrate the application of the first law of thermodynamics to this system. In addition, you are required to illustrate the importance of expressions for work done in the system through the application of the first law. 50 kJ/h Room 1m x 1m x 1m 100 kJ/h Steam W. (Cengel) Figure 1: Schematic for task 1. Initially, the room contains 1.2 kg of air at 100 kPa. The steam radiator transfers heat at a rate of 100 kJ/h, and a 10 W fan is used to distribute the warm air in the room. The rate of heat loss from the room is estimated to be about 50 kJ/h. During the process, the pressure is increased linearly until 110 kPa after x of operating hours when the final volume is equal 1.1 m3. You must follow the following steps to help your customer: STEP 1 Assume the air in the…An electric hot water heater consumes 3.1 kilowatts of electricity and converts it to heat. How long will it take the water heater to heat a 67 gallon tank of water from 10 degrees Celsius to 50 degrees Celsius? (1 kilogram of water is 0.37 gallons, 1 Calorie = 4200 J). It may be helpful to refer back to the weekly handout for guidance on this problem. Your final answer should be in minutes (rounded to the nearest 10 minutes).