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Ch 18: A Macroscopic Description of Matter
Knight Calc - Physics for Scientists and Engineers 5th Edition
Knight Calc5th EditionPhysics for Scientists and EngineersISBN: 9780137344796당신이 사용하는 게 아니라요?교과서 변경
18장, 문제 35a

A gas with an initial temperature of 900°C undergoes the process shown in FIGURE EX18.35. What type of process is this?

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Step 1: Analyze the graph provided. The graph shows pressure (p) on the y-axis and volume (V) on the x-axis. The curve represents the relationship between pressure and volume during the process. The curve is hyperbolic, indicating an inverse relationship between pressure and volume.
Step 2: Recognize the type of thermodynamic process. A hyperbolic curve on a p-V diagram typically represents an isothermal process, where the temperature remains constant throughout the process. This is because the product of pressure and volume (pV) remains constant, which is a characteristic of isothermal processes.
Step 3: Confirm the process type using the ideal gas law. The ideal gas law is given by pV=nRT. If temperature (T) is constant, then pV remains constant, which matches the behavior shown in the graph.
Step 4: Note that the initial temperature of the gas is given as 900°C. However, this temperature does not change during the process if it is isothermal. The temperature remains constant throughout the process.
Step 5: Conclude that the process shown in the graph is an isothermal process, based on the hyperbolic shape of the curve and the constant product of pressure and volume.

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주요 개념

질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.

Ideal Gas Law

The Ideal Gas Law describes the relationship between pressure (P), volume (V), temperature (T), and the number of moles (n) of a gas, expressed as PV = nRT. This law is fundamental in understanding gas behavior under various conditions and is crucial for analyzing processes involving gases, such as the one depicted in the graph.
추천 영상:
가이드 코스
07:21
Ideal Gases and the Ideal Gas Law

Isothermal Process

An isothermal process occurs when a gas expands or compresses at a constant temperature. In the context of the graph, if the temperature remains constant while pressure and volume change, the process can be classified as isothermal, which is characterized by a hyperbolic curve on a pressure-volume graph.
추천 영상:
가이드 코스
06:13
Entropy & Ideal Gas Processes

Thermodynamic Processes

Thermodynamic processes refer to the changes in state variables of a system, such as pressure, volume, and temperature. Understanding the type of process (isothermal, adiabatic, isobaric, or isochoric) is essential for analyzing how energy is transferred and transformed in a gas, as illustrated in the provided graph.
추천 영상:
가이드 코스
08:45
Properties of Cyclic Thermodynamic Processes