CLASS 11 | ONE SHOT | Kinetic Theory | Physics | NEET 2024 | Xylem NEET Tamil

hi hello and welcome back to channel physics the one shot series with me your sh maam you people know when sh m is here know if you're right yes unit and disclaimer exact chemistry classes physics class physics exam which is not necessary for your but St of most because because we are the complete neat examination guide right without anyay theory of gases okay ktic theory of gases upgraded syllabus okay and the link start that is more than enough for your physics need examination okay so start first concept ideal gas so IDE gas we will be keep on talking the perfect perfectas Rel so volume gas contains large number of molecules gas but they are Loosely packed correct the molecules have negligible volume negligible volume when compared to the volume of the container volume gas okay so this is your first because they are molecules that means okay is it is an elastic okay El go and watch work energy molecules do not have a preferred direction of motion right left right left right left right motion they jumping out oftion between two consecutive collisions molecules move in a straight line ma' mean free path exactly mean freeth electricity because one will be moving forward so that means random Direction straight it will be traving in a straight line meane lamb okay and next important the effect of force of gravity is negligible the effect of force of gravity is negligible isible gas interon they are having eny amount of okay so next Point real gases real gases approach ideal gas behavior at low pressure and high temperature one can be piure right number of [Music] m a gas is said to be ideal if it obeys the following gas law okay because we know current electricity is directly proportional to I for a particular temperature for constant temper will be inversely proportional to each other okay pressure is inversely proportional to the volume okay so pressure is inversely proportional to the volume okay which is hypera inverse okay is Conant [Music] temperature constant temperature constant okay this is12 T3 taking AAL graphic okay either T1 either t P2 straight P3 okay so P1 P1 P2 P3 P3 is greater than P2 is greater than P1 so the order P3 is greater than P2 is greater than P1 the order correct will so coming back to the formula directly to Y okay so that means that means temperature is directly proportional T3 is greater than T2 greater than T1 t23 T3 is greater than T2 is greater than T1 okay Ma so this is very important okay don't conf that okay pressure P3 P2 P1 temperature T3 is greater than T2 is greater than1 okay so now the next Formula is the next law is charlesw okay constant volume is directly proportional to the temperature volume is directly proportional to The Temper okay okay volume is directly proportional to the temperature [Music] let me say this is P1 this is P2 this is P3 volume temp1 T1 T2 T3 T3 is greater than T2 is greater than T1 okay so now volum directly proportional okay pressure P1 is greater than P2 is greater than P3 pressure P1 is greater than P2 is greater than P3 because pressure is inversely proportional to the volume inversely proportional to the volume because Conant temperature okay Vol inversely proportional for a mild example [Music] pressure is directly proportional to temperature when you are having number of moles as a const number because the relation in the relation will be taking place when you have number of moles as constant the next important law is G directly proportional to each [Music] other okay directly proportional everything comes to appc for okay people know pressure con volume prely volum P2 okay P2 is greater than P1 correct P2 is greater than1 because inversely V1 is greater than V2 so V1 is greater than V2 number number of okay explained it okay gas condition okay particular sit situation MO is a practical unit to express the amount of gas exactly because so that means okay for for example people know that's my favorite 10 my so that will be 10 G to make the calculations easier to make the understanding easier okay one Mo of any substance is the amount of that substance which contains avagadro number which contains a [Music] the aad number na is defined as the number of carbon atoms contained exactly in 12 G of carbon 12 okay 2 we got 6.2 into 10 the power 23 okay we have fixed okay same temperature okay at same temperature pressure and volume of different gases okay so listen same temp and volume okay pressure temperature volume different gases they contain same number of molecules they contain same number of molecules same amount of molecules same number ofec of the nature of the gas same temper pressure and Vol that means constant molec HTH simple okay constantes number of okay 6.2 power 23 okay number it's exactly a number okay so number of particles divided by avagadro number number of particles divided by AV okay simp okay so now let's talk about number number P pressure volume is equal to NR okay okay number of moles in the gas okay number of moles number of gas and Universal La of gas contion 8.31 2 calculations it will be easy okay so R is equal to gas constant is equal to 25 / 3 and now the next important concept which we have to study is Graham's law of effusion ma'am diffusion fusus is nothing butes will be traveling traveling traveling when two gases are gas are at constant pressure and temperature are at constant pressure and temperature molecules or atom with a lower molecular mass lower molecular okay so molecular mass will fuse faster than the higher molecular mass of our at right is but is getting dispersed at when pressure and temperatures are constant okay pressure and temperatures are constant the rate of effusion of two different gases at equal pressure and temperatures will be R is nothing but rate ofus R so Fusion will be inversely proportional to 1 by root of M M M is nothing but your M okay is nothing but [Music] your okay so R is inversely proportional to the mass root of doon's Law of Partial press pressure so doon's Law of Partial Pressure are coming to say is at constant volume okay homework you have to make a formula sheet you have to make a [Music] formula because please do that okay so coming back to the point PR [Music] gas combination mix simp you will be getting total pressure you will be getting total pressure total pressure Cate the total pressure will be equal to sum of the partial pressures of the constituent okay okay pressure of gases okay so pressure of gas in terms of kinetic energy p isal 2 by3 energy divid the volume this is your volume enery mocity M into VM s number of moles okay number of mes of one for okay gas in a container will always be in m 3 pv/ 2 so 3 pv/ B con R okay number of okay so now density of the gas pressure [Music] soas PV pressure volume is equal to constant so pressure volume so nrt / V into m / M okay in the m / total gas okay so number of molecules number of moles m of the gas by volume volume can be written as density total mass divided by total volume is equal to Total density of the gas PM ided by RT PM ided by RT p is nothing but the total pressure m is nothing but your molar mass and R is nothing but your universal gas constant T is nothing but the temperature okay in the formulas perfect okay so now let's go for the next most important and very interesting topic which is speed of gas okay gas speed throughour speed m root mean Square value so that is your R Ro meare first Square it root it Square it mean Ro it okay so and finally root R Ms okay so that means for example V1 V2 [Music] V3 so this is your VM so this is going to be your VMS more like an average more like an average but not exactly the average okay not exactly the average okay so this is your vrms value this is the vrms value' of 3T id M M is nothing but your molecular mass of gas m is nothing but your molecular mass of gas okay so molecular mass of gas clear so VMS is equal to root of 3 RT / m 3 RT / m okay and which is distribution Max distribution because mean probability molecules which is mean probability okay so mean probability zero mean probability slope value will be zero okays value so that means the particular velocity so that is okay vot 3ot 3/ M okay complete average velocity complete average velocity and but under the Curve will be same the Curve will be very very constant okay Conant most of the particle most of the most the toal number of molecules total number of molecules because that means Maxim it doesn't matter but toal number ofes total number of molecules so next value Oran equal root of n ID RT / M so root of RT id M easy easy peasy L Center correct okays value will be okay because the pressure because pressure andity okay so keep this in your mind okay so the main concept is main concept is so Peak aage okay PE yes so next concept okay you will be getting very very immedate because link will be activ active every day okay 24 activated now so the next concept is specific and molar heat capacity okay specific and molar heat capacity ma'am specific heat Capac okay specificat capacity right one substance capacity and listen specific heat capacity volume this is very important okay CV is equal to molar specific heat capacity of an ideal gas at constant volume const pressure so now in the M specific heat capacity different Ty [Music] ofas molar specific capacity with constant volume will be equal to 3x2 into R rival gas okay specificat capacity in the ratio of specific heat the ratio of specific heat mayor constant okay GMA will be equal to CP / CV so CP / CV you will be getting 5 by3 you will be getting 5 by3 and gas specific heat capacity at constant pressure minus minus constant volume will be equal to the universal gas constant okay formula is much much much more important important okay states of [Music] matter so now gasant volume 9 2 which is which is Dee of freedom po gas that is your rotational mode of degree of Freedom okayed so 3 + f into R okay 3 + f into R 4 + r will be 4 R okay 4 3 4 3 okay so now let us discuss of freedom is your degree of Freedom okay mu is equal to I mean GMA is equal to 1 + 1 + 2 / soee Freedom 3 into 1 3 3 + 2 5 so 5 by 3 so that is much much much more important that is much much more important that is much more important okay clear yes clear ma'am clear Ma and now now let's talk about degree of freedom freedom that is my rights my of gas possible possible is using a lot of [Music] things one ISL motion another one is rational motion gasis it's because transs available and when we are talking about rotational motion when we are talking about rotational motion mon POS we have to add it we have to add it degree of of Freedom F degree of freedom and now the next and most important thing is law of of energy okay it was doing it okaye freed [Music] so so bman constant which is 1.8 1 38 into 10 powerus 23 per kin and bman Conant gas conival gas con 2 that is important so and so gas con P pressure into volume okay [Music] that is take it for all the things okay and now let us roll back to the chart equation right so gamma is equal to 1 + 1 + 2 by [Music] f so U is equal to U will be equal to U will be equal to degree of Freedom divided okay specific heat capacity when volume is constant so Dee of Freedom okay we can write it as cv+ R mention and then CP cval 1 + 2 So Sol we we begin to Sol okay diom lar po by 2 R nonlinear polyatomic that is 6 by2 r CV + r CV + r cv+ r formula so CV + r that is your CP which is 5 ided by 2 R and 7 by 5 7 by 2 ided by R and 4 R 7 by2 ided by R we will beting CP so that is what we have here okay listen so cpal cv+ r c 3x2 r + r 3 2+ 1 2 into 1 will be 2 2 + 3 will be so 5 5 2 + 1 so 2 so 7 CP can be also written as R into 1 + CV R into 1+ CV you will be getting you will be getting okay any more doubts so these are the important characteristics you have to remember this okay so now the next topic of discussion is going to be mean free path meane already straight straight okay okay and they cannot move they cannot move straight and okay so their path keep oned okay so average distance between two successive Collision called the mean free path formula l isal 1 / < tk2 into n² n² number of molecules volume soal number of molecules per volume that diameter of the particle or radius of the volume okay radius of the so diameter of the particle is equal to radius of the swept volume of the particle if temperature increases speed of the particle increases temperature which means eny okay in a highly evacuated tube n is small and the mean free path can be also large as large as length as the tube okay okay more more more than enough okay back okay and now let's start with some p increase in temperature of a gas filled in a container would lead to temperature increase what will be the incity the perfect answer is going to be change in entic energy okay because temperature incre pressre right so this is your perfect answer and now the next concept the next question 201 question if CP and CV denotes the specific heat per unit mass per unit Mass okay of an ideal gas of an ideal gas of molecular weight M molecular weight m where R is the gas constant where R is the gas constant then okay gas total m m by CPUs total Cal R CP minus cval r so CP minus cval r / M and the perfect answer is option done CLE this is very very important this is very very very very important [Music] okay1 Vol volume is greater than volume so which is P1 is greater than P2 P1 is greater than P2 so P1 is greater than P2 which is P2 is lesser than P1 P2 L now let's go for another one question to which is 2015 201 is very very very important one actually two vessels separately contains two ideal gases a and gas and okay at the same temperature okay pressure of a being twice that of PB okay under such condition the density of a is found to be in the condition density of a is found to be 1.5 times of density B the mass the ratio of the molar weight of a and b is so molar r equal p mid PID what is going to be the formula what is going to be the formula so that [Music] happens MP / by RT row is equal to MP / by RT row is equal to MP / RT So Sol so row is equal to MP / RT a is equal to row a r m equal so R so r r is given as 2 into 1.5 into 1.5 into p div by 2 into 15 ID 20 so that will be 3 ided 4 so the exact answer is going to be the option C exact answer is going to be the answer C concept formula okay so that's it this is yourk question okay and thank you so so so much for your time will be easy for you so that's it it's me you people know when shy m is here know if you're right stay tuned next class

Channel: Xylem NEET Tamil

Views: 33,361

Keywords: electromagnetic induction class 12, physics, electromagnetic induction, magnetic flux, class 12 physics, class 12 physics chapter 1, class 12 physics one shot, class 12, physics class 12, neet 2024, neet, physics wallah, pw, chemistry, competition wallah, neet motivation, biology, arjuna neet, aiims delhi, xylem sslc, xylem plus one, xylem, plus one, physics for beginners, plus one class, plus one class eduport, plus one physics, plus one arabic class, Xylem Neet Tamil

Id: V5kzbt6TGtI

Length: 86min 53sec (5213 seconds)

Published: Sat Dec 09 2023