# tailieunhanh - Lecture Companion site to accompany thermodynamics: An engineering approach (7/e): Chapter 3 - Yunus Çengel, Michael A. Boles

## Chapter 3 - Properties of pure substances. The objectives of Chapter 3 are to: Introduce the concept of a pure substance, discuss the physics of phase-change processes. Illustrate the P-v, T-v, and P-T property diagrams and P-v-T surfaces of pure substances, demonstrate the procedures for determining thermodynamic properties of pure substances from tables of property data, describe the hypothetical substance “ideal gas” and the ideal-gas equation of state,. | Chapter 3 Properties of Pure Substances Study Guide in PowerPoint to accompany Thermodynamics: An Engineering Approach, 7th edition by Yunus A. Çengel and Michael A. Boles We now turn our attention to the concept of pure substances and the presentation of their data. Simple System A simple system is one in which the effects of motion, viscosity, fluid shear, capillarity, anisotropic stress, and external force fields are absent. Homogeneous Substance A substance that has uniform thermodynamic properties throughout is said to be homogeneous. Pure Substance A pure substance has a homogeneous and invariable chemical composition and may exist in more than one phase. Examples: 1. Water (solid, liquid, and vapor phases) 2. Mixture of liquid water and water vapor 3. Carbon dioxide, CO2 4. Nitrogen, N2 5. Mixtures of gases, such as air, as long as there is no change of phase. State Postulate Again, the state postulate for a simple, pure substance states that the . | Chapter 3 Properties of Pure Substances Study Guide in PowerPoint to accompany Thermodynamics: An Engineering Approach, 7th edition by Yunus A. Çengel and Michael A. Boles We now turn our attention to the concept of pure substances and the presentation of their data. Simple System A simple system is one in which the effects of motion, viscosity, fluid shear, capillarity, anisotropic stress, and external force fields are absent. Homogeneous Substance A substance that has uniform thermodynamic properties throughout is said to be homogeneous. Pure Substance A pure substance has a homogeneous and invariable chemical composition and may exist in more than one phase. Examples: 1. Water (solid, liquid, and vapor phases) 2. Mixture of liquid water and water vapor 3. Carbon dioxide, CO2 4. Nitrogen, N2 5. Mixtures of gases, such as air, as long as there is no change of phase. State Postulate Again, the state postulate for a simple, pure substance states that the equilibrium state can be determined by specifying any two independent intensive properties. The P-V-T Surface for a Real Substance P-V-T Surface for a Substance that contracts upon freezing For more information and animations illustrating this topic visit the Animation Library developed by Professor S. Bhattacharjee, San Diego State University, at this link. P-V-T Surface for a Substance that expands upon freezing Real substances that readily change phase from solid to liquid to gas such as water, refrigerant-134a, and ammonia cannot be treated as ideal gases in general. The pressure, volume, temperature relation, or equation of state for these substances is generally very complicated, and the thermodynamic properties are given in table form. The properties of these substances may be illustrated by the functional relation F(P,v,T)=0, called an equation of state. The above two figures illustrate the function for a substance that .

TÀI LIỆU LIÊN QUAN
1    68    0
6    70    0
14    71    2
28    40    1
17    55    3
168    70    0
52    95    0
32    83    0
61    82    0
34    73    0
TÀI LIỆU XEM NHIỀU
8    460267    47
14    13027    40
13    9338    488
3    8286    104
14    8014    417
16    6869    400
8    6850    2146
249    5986    984
7    4710    3
17    4642    195
TỪ KHÓA LIÊN QUAN
TÀI LIỆU MỚI ĐĂNG
4    141    0    21-03-2023
46    140    0    21-03-2023
7    112    0    21-03-2023
10    134    0    21-03-2023
117    138    0    21-03-2023
2    128    0    21-03-2023
2    127    0    21-03-2023
5    107    0    21-03-2023
14    107    0    21-03-2023
3    125    0    21-03-2023
TÀI LIỆU HOT
8    6850    2146
112    2564    1122
249    5986    984
561    1901    575
152    2233    548
62    2040    496
122    2663    491
13    9338    488
35    2826    437
14    8014    417
Đã phát hiện trình chặn quảng cáo AdBlock
Trang web này phụ thuộc vào doanh thu từ số lần hiển thị quảng cáo để tồn tại. Vui lòng tắt trình chặn quảng cáo của bạn hoặc tạm dừng tính năng chặn quảng cáo cho trang web này.