Gas ideal monoatomik dalam sebuah wadah mengalami kompresi adiabatik. Mula - mula tekanan gas adalah 1 atmosfer, volume 1 dan suhunya 300 K. Bila setelah ekspansi suhunya menjadi 1200 K maka volume gas tadi di akhir kompresi adalah? (UM UGM 2013) A. Sejumlah gas ideal monoatomik mula-mula memiliki volume 250 cc/kmol dan tekanan 120 kpa. Jika dipanaskan dengan tekanan tetap sehingga mengembang. Misalkan konstanta gas universal dinyatakan sebagai R J. Jika pada proses itu temperatur gas naik sebesar 38,4/R kelvin.

1. Gas Ideal Monoatomik Dalam Suatu Wadah
2. Sejumlah Gas Ideal Monoatomik Mula Mula
3. Gas Ideal Monoatomik Sebanyak 0 5 Kmol

In physics and chemistry, 'monatomic' is a combination of the words 'mono' and 'atomic', and means 'single atom'. It is usually applied to gases: a monatomic gas is one in which atoms are not bound to each other. Examples at standard conditions include the noble gases argon, krypton, and xenon, though all chemical elements will be monatomic in the gas phase at sufficiently high temperatures. The thermodynamic behavior of a monatomic gas is extremely simple when compared to polyatomic gases because it is free of any rotational or vibrational energy.^[1]

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Soal dan pembahasan tentang gas ideal- 1. Suatu gas ideal mengalami proses isotermal pada suhu T sehingga volumenya menjadi dua kali. Jika R adalah konstanta gas molar, usaha yang dikerjakan oleh gas penjelasan dengan lengkap berbagai istilah dengan bahasa yang mudah dipahami - Usaha321.net. It is usually applied to gases: a monatomic gas is one in which atoms are not bound to each other. Examples at standard conditions include the noble gases argon, krypton, and xenon, though all chemical elements will be monatomic in the gas phase at sufficiently high temperatures.

Noble gases[edit]

Gas Ideal Monoatomik Dalam Suatu Wadah

The only chemical elements that are stable single atommolecules at standard temperature and pressure (STP) are the noble gases. These are helium, neon, argon, krypton, xenon, and radon. Noble gases have a full outer valence shell making them rather non-reactive species.^[2] While these elements have been described historically as completely inert, chemical compounds have been synthesized with all but neon and helium.^[3]

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Sejumlah Gas Ideal Monoatomik Mula Mula

When grouped together with the homonucleardiatomic gases such as nitrogen (N₂), the noble gases are called 'elemental gases' or 'molecular gases' to distinguish them from molecules that are also chemical compounds.

Thermodynamic properties[edit]

The only possible motion of an atom in a monatomic gas is translation (electronic excitation is not important at room temperature). Thus by the equipartition theorem, the kinetic energy of a single atom of a monatomic gas at thermodynamic temperatureT is given by ${\displaystyle \frac{3}{2}{k}_{b}T}$, where k_b is Boltzmann's constant. One mole of atoms contains an Avogadro number (${\displaystyle {\mathcal{N}}_a}$) of atoms, so that the energy of one mole of atoms of a monoatomic gas is ${\displaystyle \frac{3}{2}{k}_{b}T{\mathcal{N}}_a=\frac{3}{2}RT}$, where R is the gas constant.

Kies 3.2 14. In an adiabatic process, monatomic gases have an idealised γ-factor (C_p/C_v) of 5/3, as opposed to 7/5 for ideal diatomic gases where rotation (but not vibration at room temperature) also contributes. Also, for ideal monatomic gases:^[4][5][6]

the molar heat capacity at constant pressure (C_p) is 5/2 R = 20.8 J K⁻¹ mol⁻¹ (4.97 cal K⁻¹ mol⁻¹).

the molar heat capacity at constant volume (C_v) is 3/2 R = 12.5 J K⁻¹ mol⁻¹ (2.98 cal K⁻¹ mol⁻¹).

References[edit]

1. ^'monatomic gas'. Encyclopædia Britannica. Retrieved 6 June 2016.
2. ^Laszlo, Pierre; Schrobilgen, Gary J. (1988-04-01). 'Ein Pionier oder mehrere Pioniere? Die Entdeckung der Edelgas-Verbindungen'. Angewandte Chemie. 100 (4): 495–506. doi:10.1002/ange.19881000406. ISSN1521-3757.
3. ^Christe, Karl O. (2001-04-17). 'A Renaissance in Noble Gas Chemistry'. Angewandte Chemie International Edition. 40 (8): 1419–1421. doi:10.1002/1521-3773(20010417)40:8<1419::aid-anie1419>3.0.co;2-j. ISSN1521-3773. PMID11317290.
4. ^Heat Capacity of an Ideal Gas
5. ^Heat Capacity of Ideal Gases
6. ^Lecture 3: Thermodynamics of Ideal Gases & Calorimetry^{[permanent dead link]}, p. 2

Gas Ideal Monoatomik Sebanyak 0 5 Kmol