Maitiro Ekuverenga Kumanikidzwa kweGasi
Kumanikidzwa kwegasi ipfungwa yakakosha mufizikisi nekemikari inowanzoonekwa muhupenyu hwezuva nezuva—kubva pamatairi emotokari nemasilinda eLPG kusvika kumaaerosols nemaitiro erabhoritari. Kunzwisisa maitiro ekuverenga kumanikidzwa kwegasi kunotibatsira kufanotaura kuti gasi richazvibata sei kana huwandu hwaro hwachinja, tembiricha yaro ikachinja, kana huwandu hwaro hukawedzera. Chinyorwa chino chinokurukura tsananguro yekumanikidzwa kwegasi, mayuniti anoshandiswa, uye mafomura makuru anoshandiswa kuriverenga, pamwe chete nemienzaniso.
1. Kunzwisisa Kumanikidzwa kweGasi
Kumanikidzwa kwegasi isimba pachikamu chimwe nechimwe chinoshandiswa nezvikamu zvegasi pazvinorovera pamadziro emudziyo. Kunyangwe gasi richiratidzika se "rakareruka" uye risingaonekwe, zvikamu zvegasi zviri kufamba nekukurumidza uye zvisina kurongeka. Kuroverana uku nguva dzose ndiko kunokonzera kumanikidzwa.
Pamasvomhu, kumanikidzwa kunotsanangurwa se:
P = F / A
Information:
– P = kumanikidzwa
– F = simba
– A = nzvimbo yendege (nzvimbo)
Zvisinei, mukuita kwekuverenga gasi (kunyanya mukemistri nefizikisi), kumanikidzwa kunowanzo verengerwa uchishandisa ideal gas equation kana mimwe mitemo yegasi.
2. Zvikamu zveGasi Zvinoshandiswa Kazhinji
Kumanikidzwa kwegasi kunogona kuratidzwa mumayuniti akasiyana-siyana. Aya ndiwo mayuniti akajairika:
1. Pascal (Pa)
Mayuniti eSI. 1 Pa = 1 N/m².
2. Kilopascal (kPa)
1 kPa = 1000 Pa.
3. Mhepo (atm)
Inoshandiswa zvakanyanya mumakemikari.
1 atm = 101325 Pa ≈ 101,3 kPa.
4. mmHg kana Torr
Inowanzoshandiswa mukuyedza BP uye vacuum.
1 atm = 760 mmHg = 760 Torr.
5. bhawa
Inowanzoshandiswa muinjiniya.
Bhawa rimwe chete = 100 kPa.
Kushandurwa kweyuniti kwakakosha pakuverenga nguva dzose. Semuenzaniso, kana uri kushandisa equation yegesi yakakodzera uye uchishandisa R mumayuniti eL·atm/mol·K, saka kumanikidzwa kunofanira kunge kuri muatm, vhoriyamu mumalita, uye tembiricha muKelvin.
3. Mitemo Yekutanga Yegasi Yekuverenga Kumanikidzwa
a) Mutemo waBoyle (Kumanikidzwa vs. Vhoriyamu)
Mutemo waBoyle unoti pakupisa kwakafanana uye huwandu hwegasi hwakaenzana, kumanikidzwa kunoenderana nehukuru hwemhepo:
P₁V₁ = P₂V₂
Information:
– P₁, V₁ = kumanikidzwa kwekutanga uye vhoriyamu
– P₂, V₂ = kumanikidzwa kwekupedzisira uye vhoriyamu
Muenzaniso:
Gasi riri mupiston rine kumanikidzwa kwe2 atm uye vhoriyamu ye3 L. Gasi rinomanikidzwa kusvika vhoriyamu yaro yava 1,5 L patembiricha yakaenzana. Chii chinonzi kumanikidzwa kwekupedzisira?
Shandisa fomura iyi:
P₁V₁ = P₂V₂
2 atm × 3 L = P₂ × 1,5 L
6 = 1,5P₂
P₂ = 4 atm
Saka, kumanikidzwa kwekupedzisira i4 atm.
b) Mutemo weGay-Lussac (Kudzvanywa vs Tembiricha)
Kana huwandu hwegasi hukaramba hwakafanana, kumanikidzwa kwacho kunoenderana zvakananga netembiricha yakakwana (Kelvin):
P₁ / T₁ = P₂ / T₂
Information:
– T inofanira kunge iri muKelvin (K), kwete Celsius.
Muenzaniso:
Kumanikidzwa kwegasi musirindiri i1,5 atm pa27°C. Sirinda inodziiswa kusvika 127°C, asi vhoriyamu yayo inoramba yakadaro. Chii chinonzi kumanikidzwa kwekupedzisira?
Chinja tembiricha kuita Kelvin:
T₁ = 27 + 273 = 300 K
T₂ = 127 + 273 = 400 K
Kuverenga:
P₁/T₁ = P₂/T₂
1,5/300 = P₂/400
P₂ = 1,5 × (400/300) = 2,0 atm
Kumanikidzwa kwekupedzisira i2 atm.
c) Mutemo weGasi Rinosanganiswa (Boyle + Charles + Gay-Lussac)
Kana huwandu hwegasi hukaramba hwakafanana asi kumanikidzwa, vhoriyamu, uye tembiricha zvese zvichigona kuchinja:
(P₁V₁) / T₁ = (P₂V₂) / T₂
Izvi zvinonyanya kubatsira panyaya dzine chekuita nekuchinja kwetembiricha uye huwandu panguva imwe chete.
Muenzaniso:
Gasi iri rine kumanikidzwa kwe1 atm, vhoriyamu ye2 L, uye tembiricha ye300 K. Zvadaro rinoshanduka kuita vhoriyamu ye3 L uye tembiricha ye450 K. Chii chinonzi kumanikidzwa kwekupedzisira?
(P₁V₁)/T₁ = (P₂V₂)/T₂
(1 × 2)/300 = (P₂ × 3)/450
2/300 = 3P₂/450
0,00667 = 0,00667P₂
P₂ = 1 atm
Kumanikidzwa kwekupedzisira kunoramba kuri 1 atm.
4. Kuverenga Kumanikidzwa neIdeal Gas Equation
Iyo yakanaka gas equation ndiyo fomura yakajairika yekuverenga kumanikidzwa kwegasi kana huwandu hwemamoles huchizivikanwa:
PV = nRT
Kana uchida kuverenga kumanikidzwa:
P = (nRT) / V
Information:
– P = kumanikidzwa
– V = vhoriyamu
– n = nhamba yemamota egasi
– R = gasi risingaperi
– T = tembiricha (K)
Kukosha kweR kunoenderana nemayuniti anoshandiswa. Anonyanya kushandiswa ndeaya:
– R = 0,08206 L·atm/mol·K
– R = 8,314 J/mol·K (kana uchishandisa Pa uye m³)
Muenzaniso:
Mamoles 0,5 egasi ari mumudziyo we10 L pa27°C. Chii chiri kumanikidzwa muatm?
Chinja tembiricha:
T = 27 + 273 = 300 K
P = nRT/V
P = (0,5 × 0,08206 × 300) / 10
P = (12,309) / 10
P = 1,2309 atm
Saka kumanikidzwa kwegasi ≈ 1,23 atm.
5. Kumanikidzwa Kwechikamu Mumisanganiswa Yegasi (Mutemo waDalton)
Kana mudziyo une musanganiswa wemagasi akati wandei, kumanikidzwa kwese ndiko huwandu hwezvishoma zvemagasi ese:
P_total = P₁ + P₂ + P₃ + …
Kumanikidzwa kwegasi i kunogona kuverengerwa ne:
Pᵢ = xᵢ × P_total
apo xᵢ chikamu chemole:
xᵢ = nᵢ / n_total
Muenzaniso:
Mumudziyo, mune mamoles maviri eN₂ uye mole imwe yeO₂. Kumanikidzwa kwese kwese i3 atm. Chii chinonzi kumanikidzwa kwechikamu cheO₂?
n_huwandu = 2 + 1 = 3 mol
x_O2 = 1/3
P_O2 = x_O2 × P_huwandu = (1/3) × 3 atm = 1 atm
Kumanikidzwa kwechikamu cheO₂ = 1 atm.
6. Mazano Akakosha Ekudzivirira Zvikanganiso Mukuverenga Kumanikidzwa Kwegesi
1. Shandisa tembiricha yeKelvin nguva dzose
T(K) = T(°C) + 273.
2. Enzanisa mayuniti usati waverenga.
Kana R iri muL·atm, shandisa vhoriyamu ye litre uye kumanikidzwa kwe atm.
3. Tarisa kana maitiro acho ari akafanana
Boyle: tembiricha inogara iripo.
Gay-Lussac: vhoriyamu isingachinji.
Charles: kumanikidzwa nguva dzose (kunyange zvisina kutaurwa zvakadzama pano).
Magasi akabatanidzwa: zvese zvinogona kuchinja.
4. Shandisa muenzaniso wakanaka wegesi kana mamoles achizivikanwa.
Kana ukapihwa huremu hwegasi, tanga wachinja kuita mamota:
n = m / Va.
5. Nyatsoteerera mamiriro emubvunzo
Semuenzaniso, muchubhu yakavharwa zvakasimba (huwandu hwakagadzika), kupisa kuchawedzera kumanikidzwa zvichienderana neGay-Lussac.
Mhedziso
Maitiro ekuverenga kumanikidzwa kwegasi zvinoenderana nemamiriro ezvinhu ehurongwa: kana tembiricha ikaramba yakafanana, vhoriyamu inoramba yakafanana, kana kuti zvese zvinoshanduka. Kune zviri nyore, mitemo yaBoyle naGay-Lussac inobatsira. Kune mamwe mamiriro ezvinhu akajairika, combined gas equation uye ideal gas equation ndizvo zvishandiso zvikuru. Kana magasi akasanganiswa, mutemo waDalton unoshandiswa kuona kumanikidzwa kwese uye kwechikamu. Nekunzwisisa mafomula, mayuniti, uye matanho ekushandura, unogona kugadzirisa matambudziko akasiyana-siyana ekumanikidzwa kwegasi nekukurumidza uye nemazvo.
Kana muchida, ndinogona kugadzira chinyorwa chino nemibvunzo yakawanda yekudzidzira (semuenzaniso mibvunzo gumi kusvika gumi nemishanu) pamwe chete netsananguro nhanho nhanho.
