1. Saya coba cari dari bbrp sumber, penyelesaian secara klasik adalah semua molekul akan berhenti bergerak pada -273.15C sehingga secara internasinaol disepakati sebagai kondisi nol mutlak. Tetapi jika mekanika kuantum yang digunakan maka sebenarnya masih ada sedikit gerakan dr partikel tsb (agar tidak melanggar prinsip ketidakpastian Heisenberg).
2. Sampai saat ini belum ada yg bisa mencapai nol mutlak apalagi untuk lebih rendah lagi. Suhu yg paling dekat dg nol mutlak sampai saat ini adalah 450pK (450x10^(-12) K)
Andreas.
1. http://en.wikipedia.org/wiki/Absolute_zero
Absolute zero
From Wikipedia, the free encyclopedia
Absolute zero is the point on the thermodynamic (absolute) temperature scale where all kinetic motion in the particles comprising matter ceases and they are at complete rest in the âclassicâ (non-quantum mechanical) sense. At absolute zero, matter contains no heat energy. By international agreement, absolute zero is a temperature of precisely â273.15 °C (â459.67 °F). Throughout the scientific world where measurements are made in SI units, thermodynamic temperature is measured in kelvins where absolute zero is 0 K. Many engineering fields in the U.S. measure thermodynamic temperature using the Rankine scale where absolute zero is 0 °R.
Scientists have made great advancements in achieving temperatures ever closer to absolute zero (where matter exhibits odd quantum effects). In 1994 the NIST achieved a record cold temperature of 700 nK (billionths of a kelvin). In 2003, researchers at MIT eclipsed this with a new record of 450 pK (0.00045 nK).
2. http://scienceworld.wolfram.com/physics/AbsoluteZero.html
| Absolute Zero |
| The temperature at which all classical molecular motion stops, equal to 0 Kelvin or -273.15° Celsius. However, quantum mechanically, molecules cannot cease all motion (as this would violate the Heisenberg uncertainty principle), so at 0 K they still vibrate with a certain small but nonzero energy known as the zero-point energy. © 1996-2006 Eric W. Weisstein | |||||||||||
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martino dedy <[EMAIL PROTECTED]> wrote:
Ikut nimbrung...yang bkin saya bingung dari dulu adalah :1. Kenapa "paman" kelvin bisa menetapkan suhu -273der Cel sebagai 0 der K. Bagaimana bisa pak kelvin menemukan bilangan ajaib 273.....2. Bisakah kita bikin suhu di bawah 0 mutlak??....Thanks atas jawabanya...Wass
Andreas Setiawan <[EMAIL PROTECTED]> wrote:
Pada suhu 0K tidak ada lagi sumbangan energi untuk osilasi molekul, akibatnya molekul harus berhenti pada satu posisi tertentu. Posisi berhenti antara satu molekul dan molekul lainnya adalah random, sehingga pada keseluruhan susunan akan terjadi tarik-menarik yang disebabkan perbedaan jarak masing-masing molekul. Gaya tarikan yang random pada keseluruhan benda jika besarnya melewati suatu titik kritis akan menimbulkan kehancuran pada benda tsb.
CMIIW
andre.
septi khoir <[EMAIL PROTECTED]> wrote:mau tanya:kalo benda berada dalam temperatur 0K, ikatan antar molekulnya menjadi rapuh dan akhirnya menjadi sangat rapuh lalu hancur dan keadaan itu tidak pernah terjadi di alam....mohon penjelasannya...terimakasih....terimakasih banyak atas perkatiannya....(septi)
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