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QUESTION 6 At a pressure of 4 Mpa, the temperature at which liquid water boils (using...
17. Determine the specific enthalpy of liquid water at 100°C and 10 MPa, a. By using...
17. Determine the specific enthalpy of liquid water at 100°C and 10 MPa, a. By using a compressed liquid table. b. By approximating it as a saturated liquid. c. Determine the % of error involved in using the approximation rule. a. 426.62 kJ/kg, b. 419.17kJ/kg, c. 1.75 a. 426.62 kJ/kg, b. 419.17kJ/kg, C. 0.75 a. 426.62 J/kg, b. 419.17J/kg, c. 1.75
Must the amount of heat absorbed as 1 kg of saturated liquid water boils at 100...
Must the amount of heat absorbed as 1 kg of saturated liquid water boils at 100 °C, be equal to the amount of heat released as 1 kg of saturated water vapor condenses at 100 °C? Why? Which process requires more energy: completely vaporizing 1 kg of saturated liquid water at 1 atm pressure or completely vaporizing 1 kg of saturated liquid water at 8 atm pressure? Why? A food-scientist is cooking three identical beef stews in pans that are...
Consider water as the fluid of interest. Given the conditions below, choose what steam table you...
Consider water as the fluid of interest. Given the conditions below, choose what steam table you would use to calculate the other variables? A Superheated Steam B Saturated Temperature Table C Saturated Pressure Table D Compressed Liquid Table C C P =0.04 MPa and U=317.58 kJ/kg T =85.93°C and P=.06 MPa T= 37°C and P=.004575 MPa T=100°C and S=1.2506 kJ/kg-K T=120°C and H=1700 kJ/kg Submit Answer Tries 0/4
Question 4 Liquid water enters a feedwater heater at inlet 1 with inlet conditions 15 MPa,...
Question 4 Liquid water enters a feedwater heater at inlet 1 with inlet conditions 15 MPa, 40°C at 60 kg/s. Another stream of water in saturated mixture enters the heater at inlet 2 at temperature of 175 °C. The heater operates at steady state and heat transfer to surrounding can be neglected. At exit 3, saturated liquid flows out at 275 kPa. Select two (2) different values of mixture quality at inlet 2 between 0.5 and 0.8, and subsequently plot...
Refer to Figure 3 (below), depicting a regenerative Rankine cycle with a closed feedwater heater (CFWH) when considering the following system description. Saturated liquid water at a pressure of P b...
Refer to Figure 3 (below), depicting a regenerative Rankine cycle with a closed feedwater heater (CFWH) when considering the following system description. Saturated liquid water at a pressure of P before entering the CFWH. 12 kPa is pumped to a pressure of Pi-5 MPa After leaving the CFWH as a saturated liquid, the water continues to a Steam Generator which heats the water to a temperature of Ts 600°C. This superheated steam is used to drive a Turbine. A quantity...
Problem 3: Complete the following data based on the provided tables for water State 1: Pi...
Problem 3: Complete the following data based on the provided tables for water State 1: Pi = 200 kPa Tl-500°C State 2: P2 300 kPa T-1 160°C phase2- State 3: State 4: P 175 kPa P4 250 kPa ei phases Sat. vapor phase4 v0.630 /kg a7 Saturated water- Pressure table Specific volume m-/k Internal energy kJ/k Sat. Sat. Sat liquid, Evap, vapor, Press, temp, liquid, vapor LI 116,04 0.001057 1.0037 486.82 2037.7 2524.5 120.21 0.001061 0.88578 504.50 2024.6 2529.1 123.97...
The water in a pressure cooker boils at a temperature greater than 100°C because it is...
The water in a pressure cooker boils at a temperature greater than 100°C because it is under pressure. At this higher temperature, the chemical reactions associated with the cooking of food take place at a greater rate. (a) Some food cooks fully in 7.00 min in a pressure cooker at 120.0°C and in 70.0 minutes in an open pot at 100.0°C. Calculate the average activation energy for the reactions associated with the cooking of this food. kJ mol-1 (b) How...
The water in a pressure cooker boils at a temperature greater than 100°C because it is...
The water in a pressure cooker boils at a temperature greater than 100°C because it is under pressure. At this higher temperature, the chemical reactions associated with the cooking of food take place at a greater rate. (a) Some food cooks fully in 5.00 min in a pressure cooker at 114.0°C and in 25.0 minutes in an open pot at 100.0°C. Calculate the average activation energy for the reactions associated with the cooking of this food. _______ kJ mol-1 (b)...
4. (4 points) Liquid water enters a steady-state heat exchanger at P 1 MPa and T-353.15...
4. (4 points) Liquid water enters a steady-state heat exchanger at P 1 MPa and T-353.15 K, and exits as saturated water vapor at P-1 MPa A. Using the steam tables, find the change in specific enthalpy for this process. B. Using the approximation that Cp-4.19 kJ/kg-K for liquid water, find the change in enthalpy when liquid water is heated from 353.15 K to its boiling point at P 1 MPa. C. How do the answers to parts A and...
Determine the specific entropy (kJ/kg-K) of superheated water using the table below. The pressure and temperature...
Determine the specific entropy (kJ/kg-K) of superheated water using the table below. The pressure and temperature are given as P = 398.19 kPa and T = 260°C, respectively. Note: Give your answer to four decimal places. Properties of Superheated Water Vapor Tv u hs v u hs °C m/kg kJ/kg kJ/kg kJ/kg-K °C m®/kg kJ/kg kJ/kg kJ/kg-K P= 3.0 bar P= 4.0 bar Tsar= 133.55 °C Tsar= 143.63 °C Sat. 0.6058 2543.1 2724.8 6.9911 Sat. 0.4625 2553.1 2738.1 6.8951 150...
17. Determine the specific enthalpy of liquid water at 100°C and 10 MPa, a. By using a compressed liquid table. b. By approximating it as a saturated liquid. c. Determine the % of error involved in using the approximation rule. a. 426.62 kJ/kg, b. 419.17kJ/kg, c. 1.75 a. 426.62 kJ/kg, b. 419.17kJ/kg, C. 0.75 a. 426.62 J/kg, b. 419.17J/kg, c. 1.75
Must the amount of heat absorbed as 1 kg of saturated liquid water boils at 100 °C, be equal to the amount of heat released as 1 kg of saturated water vapor condenses at 100 °C? Why? Which process requires more energy: completely vaporizing 1 kg of saturated liquid water at 1 atm pressure or completely vaporizing 1 kg of saturated liquid water at 8 atm pressure? Why? A food-scientist is cooking three identical beef stews in pans that are...
Consider water as the fluid of interest. Given the conditions below, choose what steam table you would use to calculate the other variables? A Superheated Steam B Saturated Temperature Table C Saturated Pressure Table D Compressed Liquid Table C C P =0.04 MPa and U=317.58 kJ/kg T =85.93°C and P=.06 MPa T= 37°C and P=.004575 MPa T=100°C and S=1.2506 kJ/kg-K T=120°C and H=1700 kJ/kg Submit Answer Tries 0/4
Question 4 Liquid water enters a feedwater heater at inlet 1 with inlet conditions 15 MPa, 40°C at 60 kg/s. Another stream of water in saturated mixture enters the heater at inlet 2 at temperature of 175 °C. The heater operates at steady state and heat transfer to surrounding can be neglected. At exit 3, saturated liquid flows out at 275 kPa. Select two (2) different values of mixture quality at inlet 2 between 0.5 and 0.8, and subsequently plot...
Refer to Figure 3 (below), depicting a regenerative Rankine cycle with a closed feedwater heater (CFWH) when considering the following system description. Saturated liquid water at a pressure of P before entering the CFWH. 12 kPa is pumped to a pressure of Pi-5 MPa After leaving the CFWH as a saturated liquid, the water continues to a Steam Generator which heats the water to a temperature of Ts 600°C. This superheated steam is used to drive a Turbine. A quantity...
Problem 3: Complete the following data based on the provided tables for water State 1: Pi = 200 kPa Tl-500°C State 2: P2 300 kPa T-1 160°C phase2- State 3: State 4: P 175 kPa P4 250 kPa ei phases Sat. vapor phase4 v0.630 /kg a7 Saturated water- Pressure table Specific volume m-/k Internal energy kJ/k Sat. Sat. Sat liquid, Evap, vapor, Press, temp, liquid, vapor LI 116,04 0.001057 1.0037 486.82 2037.7 2524.5 120.21 0.001061 0.88578 504.50 2024.6 2529.1 123.97...
The water in a pressure cooker boils at a temperature greater than 100°C because it is under pressure. At this higher temperature, the chemical reactions associated with the cooking of food take place at a greater rate. (a) Some food cooks fully in 7.00 min in a pressure cooker at 120.0°C and in 70.0 minutes in an open pot at 100.0°C. Calculate the average activation energy for the reactions associated with the cooking of this food. kJ mol-1 (b) How...
4. (4 points) Liquid water enters a steady-state heat exchanger at P 1 MPa and T-353.15 K, and exits as saturated water vapor at P-1 MPa A. Using the steam tables, find the change in specific enthalpy for this process. B. Using the approximation that Cp-4.19 kJ/kg-K for liquid water, find the change in enthalpy when liquid water is heated from 353.15 K to its boiling point at P 1 MPa. C. How do the answers to parts A and...
Determine the specific entropy (kJ/kg-K) of superheated water using the table below. The pressure and temperature are given as P = 398.19 kPa and T = 260°C, respectively. Note: Give your answer to four decimal places. Properties of Superheated Water Vapor Tv u hs v u hs °C m/kg kJ/kg kJ/kg kJ/kg-K °C m®/kg kJ/kg kJ/kg kJ/kg-K P= 3.0 bar P= 4.0 bar Tsar= 133.55 °C Tsar= 143.63 °C Sat. 0.6058 2543.1 2724.8 6.9911 Sat. 0.4625 2553.1 2738.1 6.8951 150...
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