### Problem 3.76A piston-cylinder assembly fitted with stops contains 0.1 kg of water, initially at 1 MPa, 500°C. The water undergoes two processes in series:#### Process 1–2Constant-pressure cooling occurs until the piston face rests against the stops. The volume occupied by the water becomes one-half of its initial volume.#### Process 2–3With the piston face resting against the stops, the water cools to 25°C.**Task:**Sketch the two processes in series on a \( p-v \) (pressure-volume) diagram. Neglecting kinetic and potential energy effects, evaluate the work and heat transfer for each process, measured in kJ.#### Explanation of Diagrams- Illustrate Process 1–2 as a horizontal line on the \( p-v \) diagram, signifying constant pressure while the volume decreases to half.- Show Process 2–3 as a vertical line at constant volume, indicating the cooling of water at the stops.Evaluate the work done and heat transfer for each process separately.

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3.76 As shown in Fig. P3.76, a piston-cylinder assembly fitted with stops contains 0.1 kg of water, initially at 1 MPa, 500°C. The water undergoes two processes in series: Process 1-2: Constant-pressure cooling until the piston face rests against the stops. The volume occupied by the water is then one-half its initial volume. Process 2-3: With the piston face resting against the stops, the water cools to 25°C. Sketch the two processes in series on a p-v diagram. Neglecting kinetic and potential energy effects, evaluate for each process the work and heat transfer, each in kJ.

3.76 As shown in Fig. P3.76, a piston-cylinder assembly fitted with stops contains 0.1 kg of water, initially at 1 MPa, 500°C. The water undergoes two processes in series: Process 1-2: Constant-pressure cooling until the piston face rests against the stops. The volume occupied by the water is then one-half its initial volume. Process 2-3: With the piston face resting against the stops, the water cools to 25°C. Sketch the two processes in series on a p-v diagram. Neglecting kinetic and potential energy effects, evaluate for each process the work and heat transfer, each in kJ.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Concept explainers

Work and Heat Transfer

It is generally related to thermal engineering which tells about the use, creation, conversion and transfer of heat energy between the systems. It is also considered that to transfer heat from one source to another, transfer of masses is also required. There are various mechanisms by which, transfer of heat takes place i.e. thermal conduction, convection, radiation or by change of phase. All these mechanisms have their own specific features which sometimes occur simultaneously within the same system.

Question

### Problem 3.76

A piston-cylinder assembly fitted with stops contains 0.1 kg of water, initially at 1 MPa, 500°C. The water undergoes two processes in series:

#### Process 1–2
Constant-pressure cooling occurs until the piston face rests against the stops. The volume occupied by the water becomes one-half of its initial volume.

#### Process 2–3
With the piston face resting against the stops, the water cools to 25°C.

**Task:**
Sketch the two processes in series on a \( p-v \) (pressure-volume) diagram. Neglecting kinetic and potential energy effects, evaluate the work and heat transfer for each process, measured in kJ.

#### Explanation of Diagrams
- Illustrate Process 1–2 as a horizontal line on the \( p-v \) diagram, signifying constant pressure while the volume decreases to half.
- Show Process 2–3 as a vertical line at constant volume, indicating the cooling of water at the stops.

Evaluate the work done and heat transfer for each process separately.

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