THERMODYNAMICS LLF W/ CONNECT ACCESS
9th Edition
ISBN: 9781264446889
Author: CENGEL
Publisher: MCG
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Chapter 3.8, Problem 44P
Water initially at 200 kPa and 300°C is contained in a piston–cylinder device fitted with stops. The water is allowed to cool at constant pressure until it exists as a saturated vapor and the piston rests on the stops. Then the water continues to cool until the pressure is 100 kPa. On the T-v diagram, sketch, with respect to the saturation lines, the process curves passing through the initial, intermediate, and final states of the water. Label the T, P, and v values for end states on the process curves. Find the overall change in internal energy between the initial and final states per unit mass of water.
FIGURE P3–44
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Water initially at 200 kPa and 300°C is contained in a piston-cylinder device fitted
with stops. The water is allowed to cool at constant pressure until it exists as a saturated vapor
and the piston rests on the stops. Then the water continues to cool until the pressure is 100 kPa.
On the T-u diagram sketch, with respect to the saturation lines, the process curves passing
through both the initial, intermediate, and final states of the water. Label the T, P and v values
for end states on the process curves. Find the overall change in internal energy between the
initial and final states per unit mass of water.
Water
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The tank contains 2kg of water at 20C, 1 atm. The tank is heated. When the tank pressure reaches 300kpa, the valve opens and steam starts escaping. Heating continues and steam continues to escape while the pressure remains constant until half of the mass escapes. At this time the tank is filled with saturated vapor at 300 kpa, and the valve closes.
Question: Determine the volume of the tank and the amount of supplied heat.
Water initially at 200 kPa and 300°C is contained in a piston–cylinder device fitted with stops. The water is allowed to cool at constant pressure until it exists as a saturated vapor and the piston rests on the stops. Then the water continues to cool until the pressure is 100 kPa. On the T-v diagrams sketch, with respect to the saturation lines, the process curves pass through both the initial, intermediate, and final states of the water. Label the T, P and v values for end states on the process curves. Find the overall change in internal energy between the initial and final states per unit mass of water.
Chapter 3 Solutions
THERMODYNAMICS LLF W/ CONNECT ACCESS
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