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Question 28 (5 points) A piston-cylinder device loaded by a linear spring and contains 1

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Question 28 (5 points) A piston-cylinder device loaded by a linear spring and contains 1.3 kg of carbon dioxide. This system is heated from 100 kPa and 300 K to 300 kPa and 1030 K. Determine the total heat transfer input to this system. Round your answer to the nearest 0.1 kJ. Solve and upload your Handwritten ? EES solution by pressing the "Add a File" button below. You must also Ina your Answer and Units in the textbox below. Your Answer: [#[Q Your Answer units

Question 27 (5 points) An apple that could be approximated as a sphere of a 11.6 cm diameter, density of 240 kg/m3, and specific heat of 3.68 kJ/kg-K is cooled in a refrigerator which has a constant cabinet temperature of 3 °C. If the initial temperature of the apple is 23.1 °C, determine the maximum heat transferred from the apple, in kJ. Round your answer to the nearest 0.1 kJ. Solve and upload your Handwritten % EES solution by pressing the "Add a File" button below. You must also Iypg your Answer and Units in the textbox below. Your Answer: Your Answer units [> Add attachments to support your work

Question 26 (10 points) Steam at 75 kPa and 8 percent quality is contained in a spring-loaded piston— cylinder device, as shown in the figure, with an initial volume of 2 m3. At this state, a linear spring is touching the piston but exerts no force on it. Steam is now heated until its volume is 6.3943 m3 and its pressure is 500 kPa. Determine: (a) the mass of liquid and mass of vapor in the initial state (b) the work produced by the steam during this process. (c) the amount of heat transfer. Solve and upload your Handwritten ? EES solution by pressing the "Add a File'I button below. You must also Iyp? your Answers (with units) for (a), (b), and (c) in the textbox below.

Question 25 (1 point) A hair dryer is basically a duct of constant diameter in which a few layers of electric resistors are placed. A small fan pulls the air in and forces it through the resistors where it is heated. If the density of air is 1.10 kg/m3 at the inlet and the duct diameter is 9.3 cm at the inlet too, determine the mass flow rate of the air through the hair dryer if the air average velocity at the inlet is 2.2 m/s. Round your answer to the nearest 0.01 kg/min. Your Answer: 9g Your Answer units

Question 24 (2 points) Consider a 1.0 kW hooded open burner in an area where the unit costs of electricity and natural gas are $0.22/ kWh and $0.8/therm (1 therm = 105,500 kJ), respectively. The efficiency of open burners can be taken to be 64% for electric burners and 40% for gas burners. Determine the cost of using the electric burner for 5.0 hours of daily cooking. Round your answer to the nearest 0.01$. Your Answer: Your Answer units Properties Tables - Formula Sheet