Solution: i) Change in Temperature (in K) ii) Mass of the saltwater (in kg) iii) Quantity (Volume) of salt water (in m³)
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- If 3000 ft3 of air is crossing an evaporator coil and iscooled from 75F to 55F, what would be the volume of air, in ft3, exiting the evaporator coil?A piston cylinder arrangement initially contains 7.0 kg of super-heated steam at 100 kPa and 250 oC, now heat is removed until 0.56 condenses. 1) What is the amount of heat removed in (kJ)? 2) What is the final volume (m3)?QUESTION 2 Consider a quantity of 2.0 kg of refrigerant R-134a. The refrigerant fills a 9.9 ft weighted piston/cylinder apparatus that is at a constant pressure of 29 psi. The system is then heated until it reaches a temperature of 86 °F. a.) What is the initial temperature of the refrigerant? b.) What is the final volume of the refrigerant? Note: Refer to property tables in appendix 1 of textbook Attach File Browse Local Files
- In a piston-cylinder assembly, there is initially 2 kg of water at a temperature of 25 °C and a pressure of 100 kPa. Then heat is given to the water until its volume is 0.4 m3. At this point, the piston in the cylinder is fixed with a stopper, but the water in the cylinder continues to heat until its temperature reaches 300 oC. According to this, calculate a) the final pressure of the water, b) the amount of heat given to the water, c) the work done by the piston. d) Show these processes in the T-v (Temperature-Specific Volume) diagramAssignment #4 A closed container of water is at 700kPa. The mass of the saturated liquid is 1.78 kg, and the mass of the saturated vapor is 0.22 kg. Heat increases the pressure to 8 MPa. a) Find the final temperature, enthalpy and internal energy. b) Plot this process on a T-v diagram. (Ans: 362°C, 3024 kJ/kg, 2776 kJ/kg)II. Constant Volume Process Problem: 4000 gal/min of saturated steam at 3.0 MPa undergoes a constant volume process at until the pressure becomes 4.0 MPa. Determine the following: A. Specific volume, m³/kg B. Temperature at point 1 and 2, °C C. Mass of steam, kg/s D. Au (kJ/kg), Ah (kJ/kg), and As(kJ/(kg-K)) E. Q (kW) F. Pv and ts diagram
- Q1: If a calorimeter is not assumed to be adiabatic, how would one calculate the heat transfer? Guide Questions: What are the parameters to be considered and the equations to be used? What law of thermodynamics does this transfer of heat to the surroundings touch? Is an adiabatic system automatically considered as a closed system? Please help me understand by also attaching a reference/book/journal article. This would help me in my essay. Thank you.Ms Chian conducted an experiment using Refrigerant-134a (R-134a). She filled an80 litres vessel with 4.0 kg of R-134a at a pressure of 160 kPa.a) Determine the quality of the refrigerant.b) Calculate the volume occupied by the vapour phase (in L).c) Find the volume occupied by the liquid phase (in LQ1) The heat capacity at constant volume of hydrogen sulfide at low pressures is given by Eq. Q1-1: Co[kJ/(mol•°C)] = 0.0252 + 1.547 × 10-T – 3.012 × 10-9T² Eq. Q1-1 ........ Where, Tis temperature in °C. A quantity of H2S is kept in a piston-fitted cylinder with initial temperature, pressure, and volume equal to 25°C, 2.0 atm, and 3.0 liters, respectively. i- Calculate the heat (kJ) required to raise the gas temperature from 25°C to 1000°C, if the heating takes place at constant volume (i.e., if the piston does not move). ii- For a closed system at constant pressure with negligible kinetic and potential energy changes, the specific heat is determined by Eq. Q1-2: Cp = Cy + 0 008314 Eq. Q1-2 calculate the heat (J) required to raise the gas from 25°C to 1000°C at constant pressure. What would the piston do during this process? Given the gas constant = 0 08206 atm. Lit/ (mol. K)
- A piston-cylinder assembly initially contains B g of saturated water vapor at A kPa pressure. Next, an electric heater in the cylinder is switched on and C min. During the heater, a current of E Amps supplied from the D Volt source passes. During the period, F kJ of heat exchange occurs to the environment. a) Draw the PV diagram. b) Find the final temperature of the system? H,O E A m = B g P, = P2 = A kPa D V Saturated steam C dak. = F kJ out pressure A kPa 350 amount of steam В Gram 23 Heating time C Minute 13 Electric Potential of the Heater Volt 220 Heater current E Current 0.17 Heat transmitted to the environment F kJ 6.83How much energy (in Joules) is required to fully melt 20g of ice taken from the freezer at - 5 degree C (negative 5 C), put on a stove and gently heated until fully molten?Half a liter of liquid is being heated in a closed container to prepare food. Initial temp is 25C and desired temperature is 85C. How much energy is needed to raise the temperature of this amount of water as described? Specific heat of water is given as 4.18 kJ/(kg.K)