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Q4. A piston-cylinder device initially contains 0.5 m3 of 1.1-kg saturated liquid water and steam mixture at 100 kPa. An electric heater within the device is turned on and is allowed to pass a current of 2.0 A from a 120-V source. There's no other form of energy transfer besides the electrical work and boundary work. The piston initially rests on a set of stops, and a pressure of 200 kPa is required to move the piston. Afterwards, the system continues to raise the piston and eventually reaches a temperature of 400°C. For this problem you must use the property tables from the textbook. Determine the time it takes (in hours) for the system to just move the piston. Please pay attention: the numbers may change since they are randomized. Your answer must include 3 places after the decimal point.

Q4. A piston-cylinder device initially contains 0.5 m3 of 1.1-kg saturated liquid water and steam mixture at 100 kPa. An electric heater within the device is turned on and is allowed to pass a current of 2.0 A from a 120-V source. There's no other form of energy transfer besides the electrical work and boundary work. The piston initially rests on a set of stops, and a pressure of 200 kPa is required to move the piston. Afterwards, the system continues to raise the piston and eventually reaches a temperature of 400°C. For this problem you must use the property tables from the textbook. Determine the time it takes (in hours) for the system to just move the piston. Please pay attention: the numbers may change since they are randomized. Your answer must include 3 places after the decimal point.

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Q4. A piston-cylinder device initially contains 0.5 m3 of 1.1-kg saturated liquid water and steam mixture at 100 kPa. An electric heater within the device is turned on and is allowed to pass a current of 2.0 A from a 120-V source. There's no other form of energy transfer besides the electrical work and boundary work. The piston initially rests on a set of stops, and a pressure of 200 kPa is required to move the piston. Afterwards, the system continues to raise the piston and eventually reaches a temperature of 400°C. For this problem you must use the property tables from the textbook. Determine the time it takes (in hours) for the system to just move the piston. Please pay attention: the numbers may change since they are randomized. Your answer must include 3 places after the decimal point. P Your Answer: ミS
Transcribed Image Text:Q4. A piston-cylinder device initially contains 0.5 m3 of 1.1-kg saturated liquid water and steam mixture at 100 kPa. An electric heater within the device is turned on and is allowed to pass a current of 2.0 A from a 120-V source. There's no other form of energy transfer besides the electrical work and boundary work. The piston initially rests on a set of stops, and a pressure of 200 kPa is required to move the piston. Afterwards, the system continues to raise the piston and eventually reaches a temperature of 400°C. For this problem you must use the property tables from the textbook. Determine the time it takes (in hours) for the system to just move the piston. Please pay attention: the numbers may change since they are randomized. Your answer must include 3 places after the decimal point. P Your Answer: ミS
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