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īs 200 mt Neglo ing the heat tranfer during Pe ︸son process, caleate B. 0.994 D....
1. The exergy change of a system can be a) Only positive during a process b)...
1. The exergy change of a system can be a) Only positive during a process b) Only negative during a process c) Positive or negative during a process d) None of the above 2. Which of the following air standard heat engine cycles can have a 100% second law efficiency a) Otto cycle b) Ericsson cycle c) Diesel cycle d) Brayton cycle 3. Both energy and exergy can be transferred by a) Heat and work b) Mass and heat c)...
A frictionless-piston-cylinder device contains a liquid-vapor mixture of water at 200°C. During a constant- pressure process,...
A frictionless-piston-cylinder device contains a liquid-vapor mixture of water at 200°C. During a constant- pressure process, 500 kJ of heat is transferred to the surrounding air at 20°C. As a result, part of the water vapor contained in the cylinder condenses. a) Draw a schematic of your system including the boundary and all relevant energy transfer. (2 pts) b) Determine the entropy change of the water, in kJ/K. (3 pts) c) For the extended system (system + surroundings), write an...
please show working the question is complete. 16 a) b)c)d) approxma 02, supplemented with overtime.) 16. MT makes...
please show working
the
question is complete. 16 a) b)c)d)
approxma 02, supplemented with overtime.) 16. MT makes small camping and snowmobile trailers. The demand for camping trailers occurs between January and June (mostly in April and May). MT makes camping trail- ers from January to June, shuts down in July and then makes snowmobile trailers from August to November. Suppose now is the end of December. For simplicity, we consider every two months as a period. The forecasts for...
B. Calculation of Heat during phase change. A phase change is a physical process in which...
B. Calculation of Heat during phase change. A phase change is a physical process in which a substance goes from one phase to another. The temperature of a substance does not change as the substance goes from one phase to another. The heat of fusion (AHfus) is the amount of heat per gram (or per mole) required for a phase change that occurs at the melting point. The heat of vaporization, (Hvap) is the amount of heat per gram (or...
2. Consider a process in which two tanks A and B are connected by a valve....
2. Consider a process in which two tanks A and B are connected by a valve. Tank A, which is insulated, has a volume of 600 liters and contains steam at 1.4 MPa, 300°C. Tank B, which is uninsulated, has a volume of 300 liters and contains steam at 200 kPa, 200°C. The valve connecting the two tanks is now opened and steam flows from A to B until the temperature in A reaches 250°C, at which time the valve...
a. the sensible heat ratio (SHR) for the cooling and dehumidifying process; (2 Marks) b. the...
a. the sensible heat ratio (SHR) for the cooling and
dehumidifying process; (2 Marks) b. the supply air volume flow rate
to the office in m3 /s; (5 Marks) c. the air dry bulb temperature
and specific enthalpy of the mixture of outdoor and recirculating
air; (4 Marks) d. the cooling coil’s load in kW. (5 Marks) e. the
apparatus dew point during the cooling and dehumidifying process;
and (4 Marks) f. Discuss, with reasons, the possible effects on the...
a) What is the physical interpretation of the wet-bulb temperature? b) During winter time a room...
a) What is the physical interpretation of the wet-bulb temperature? b) During winter time a room is maintained at a steady temperature and humidity by an air-conditioning system shown. 200 mº/min of room return air at 30°C, 50% relative humidity is first mixed with 40 mº/min of outdoor at 10°C, 20% relative humidity. The mixed air is then introduced to a heater where the temperature of the air is raised to 45°C and supplied to the room. (Note that air...
Select the correct chemical formula for iron(II)acetate A. CH3COOFe B. CH3COOFe2 C. (CH3COO)2Fe D. (CH3COO)3Fe QUESTION 2 During the oxidation process of cream of tartar with H2O2 and catalyst Fe2+, y...
Select the correct chemical formula for iron(II)acetate A. CH3COOFe B. CH3COOFe2 C. (CH3COO)2Fe D. (CH3COO)3Fe QUESTION 2 During the oxidation process of cream of tartar with H2O2 and catalyst Fe2+, you observed a gas evolution. Identify the gas that is produced in this process. A. H2O(g) B. CO2(g) C. N2(g) D. O2(g) 2 QUESTION 3 The reaction you observed in part-2 can be described as A. exothermic reaction B. endothermic reaction C. metathesis reaction D. double displacement reaction QUESTION 4...
Thermal question A 60-kg hiker plans to climb Mt Kosciuszko (2228 m) starting from Thredbo (1365m). Assume that she is 25% efficient at converting chemical energy from food into mechanical work,...
Thermal question
A 60-kg hiker plans to climb Mt Kosciuszko (2228 m) starting from Thredbo (1365m). Assume that she is 25% efficient at converting chemical energy from food into mechanical work, and that essentially all the work goes into the vertical climb. (a) (3 marks) With reference to the data above, how many servings of Nutrigrain should she eat to provide enough energy for the climb? (b) (6 marks) Climbing a mountain warms you up, and makes you sweat one...
just from v. to x son March 1, 2022. During March, the following transactions were completed. GP Pro Inc. ope...
just from v. to x
son March 1, 2022. During March, the following transactions were completed. GP Pro Inc. opened Prochners on 10.000 shares of common stock for $15.000 rach ed $6,000 cash by signing a 6-month, 6%, 56,000 note payable. Interest will be paid the first day of each subsequent month 1 Purchased used truck for $8,000 cash 2 Paid $1,500 cash to cover rent from March 1 through May 31 3 Paid $2,400 cash on a 6-month insurance...
1. The exergy change of a system can be a) Only positive during a process b) Only negative during a process c) Positive or negative during a process d) None of the above 2. Which of the following air standard heat engine cycles can have a 100% second law efficiency a) Otto cycle b) Ericsson cycle c) Diesel cycle d) Brayton cycle 3. Both energy and exergy can be transferred by a) Heat and work b) Mass and heat c)...
A frictionless-piston-cylinder device contains a liquid-vapor mixture of water at 200°C. During a constant- pressure process, 500 kJ of heat is transferred to the surrounding air at 20°C. As a result, part of the water vapor contained in the cylinder condenses. a) Draw a schematic of your system including the boundary and all relevant energy transfer. (2 pts) b) Determine the entropy change of the water, in kJ/K. (3 pts) c) For the extended system (system + surroundings), write an...
please show working
the
question is complete. 16 a) b)c)d)
approxma 02, supplemented with overtime.) 16. MT makes small camping and snowmobile trailers. The demand for camping trailers occurs between January and June (mostly in April and May). MT makes camping trail- ers from January to June, shuts down in July and then makes snowmobile trailers from August to November. Suppose now is the end of December. For simplicity, we consider every two months as a period. The forecasts for...
B. Calculation of Heat during phase change. A phase change is a physical process in which a substance goes from one phase to another. The temperature of a substance does not change as the substance goes from one phase to another. The heat of fusion (AHfus) is the amount of heat per gram (or per mole) required for a phase change that occurs at the melting point. The heat of vaporization, (Hvap) is the amount of heat per gram (or...
2. Consider a process in which two tanks A and B are connected by a valve. Tank A, which is insulated, has a volume of 600 liters and contains steam at 1.4 MPa, 300°C. Tank B, which is uninsulated, has a volume of 300 liters and contains steam at 200 kPa, 200°C. The valve connecting the two tanks is now opened and steam flows from A to B until the temperature in A reaches 250°C, at which time the valve...
a. the sensible heat ratio (SHR) for the cooling and
dehumidifying process; (2 Marks) b. the supply air volume flow rate
to the office in m3 /s; (5 Marks) c. the air dry bulb temperature
and specific enthalpy of the mixture of outdoor and recirculating
air; (4 Marks) d. the cooling coil’s load in kW. (5 Marks) e. the
apparatus dew point during the cooling and dehumidifying process;
and (4 Marks) f. Discuss, with reasons, the possible effects on the...
a) What is the physical interpretation of the wet-bulb temperature? b) During winter time a room is maintained at a steady temperature and humidity by an air-conditioning system shown. 200 mº/min of room return air at 30°C, 50% relative humidity is first mixed with 40 mº/min of outdoor at 10°C, 20% relative humidity. The mixed air is then introduced to a heater where the temperature of the air is raised to 45°C and supplied to the room. (Note that air...
Thermal question
A 60-kg hiker plans to climb Mt Kosciuszko (2228 m) starting from Thredbo (1365m). Assume that she is 25% efficient at converting chemical energy from food into mechanical work, and that essentially all the work goes into the vertical climb. (a) (3 marks) With reference to the data above, how many servings of Nutrigrain should she eat to provide enough energy for the climb? (b) (6 marks) Climbing a mountain warms you up, and makes you sweat one...
just from v. to x
son March 1, 2022. During March, the following transactions were completed. GP Pro Inc. opened Prochners on 10.000 shares of common stock for $15.000 rach ed $6,000 cash by signing a 6-month, 6%, 56,000 note payable. Interest will be paid the first day of each subsequent month 1 Purchased used truck for $8,000 cash 2 Paid $1,500 cash to cover rent from March 1 through May 31 3 Paid $2,400 cash on a 6-month insurance...
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